1. Presented by The City of Sheridan-Kevin Bare

2. Additional info: http://codes.iccsafe.org/I- Codes.html http://codes.iccsafe.org/I- Codes.html www.sheridanwy.net My contact information: kbare@sheridan wy.net 307-674-5941

3. Presentation Breakdown IRC, IRC- IFGC, IFGC, & IMC Table of contents for each chapter Illustrations Modifications Strike outs show omissions Underlines are additions Not relocations Amendments

4. M1502.4.4, M1502.4.5 Dryer Exhaust Duct Power Ventilators M1502.4.6 Dryer Duct Length Identification M1503.4 Makeup Air for Range Hoods M1506.2 Exhaust Duct Length M1601.1.1, TABLE M1601.1.1, M1601.2 Above-Ground Duct Systems M1601.4 Duct Installation M1602 Return Air

5. M1502.4.4, M1502.4.5 Dryer duct power ventilators CHANGE TYPE: Addition Change: Previous editions of the code did not recognize dryer exhaust duct power ventilators (DEDPVs) as an option for clothes dryer installations. Dryer Exhaust Duct Power Ventilators (DEDPV’s) have a revised listing of UL705.

6. M1502.4.6 Dryer Exhaust Duct Length CHANGE TYPE: Modification 2015 CODE: M1502.4.5 M1502.4.6 Length Identification. Where the exhaust duct equivalent length exceeds 35 feet (10 668 mm) is concealed within the building construction, the equivalent length of the exhaust duct shall be identified on a permanent label or tag. The label or tag shall be located within 6 feet (1829 mm) of the exhaust duct connection.

7. M1505.3 Makeup Air for Range Hoods CHANGE TYPE: Modification 2015 CODE: M1503.4 Makeup Air Required. Exhaust hood systems capable of exhausting in excess of 400 cubic feet per minute (0.19 m 3/s) shall be mechanically or naturally provided with makeup air at a rate approximately equal to the exhaust air rate. Such makeup air systems shall be equipped with a means of closure and shall be automatically controlled to start and operate simultaneously with the exhaust system not less than one damper. Each damper shall be a gravity damper or an electrically operated damper that automatically opens when the exhaust system operates. Dampers shall be accessible for inspection, service, repair and replacement without removing permanent construction or any other ducts not connected to the damper being inspected, serviced, repaired or replaced. Continued on next page

8. Examples of MUA for Range Hoods

9. M1506.2 Exhaust Duct Length CHANGE TYPE: Addition M1506.2. Duct Length. The length of exhaust and supply ducts used with ventilating equipment shall not exceed the lengths determined in accordance with Table M1506.2. Exception: Duct length shall not be limited where the duct system complies with the manufacturer’s design criteria or where the flow rate of the installed ventilating equipment is verified by the installer or approved third party using a flow hood, flow grid or other airflow measuring device. Continued on next page

10. M1506.2 Exhaust Duct Length

11. M1601.1.1, Table M16.1.1.1, & M16.1.2 CHANGE TYPE: Modification 2015 CODE: M1601.1.1 Above-Ground Duct Systems. Aboveground duct systems shall conform to the following: 1. Equipment connected to duct systems shall be designed to limit discharge air temperature to a maximum of not greater than 250°F (121°C). 2. Factory-made air ducts shall be constructed of Class 0 or Class 1 materials as designated in Table M1601.1.1(1). listed and labeled in accordance with UL 181 and installed in accordance with the manufacturer’s instructions. 3. Fibrous glass duct construction shall conform to the SMACNA Fibrous Glass Duct Construction Standards or NAIMA Fibrous Glass Duct Construction Standards. 4. Field-fabricated and shop-fabricated metal and flexible duct constructions shall conform to the SMACNA HVAC Duct Construction Standards - Metal and Flexible except as allowed by Minimum thicknesses of metal duct material shall be as listed in Table M1601.1.1(2) M1601.1.1. Galvanized steel shall conform to ASTM A 653. Metallic ducts shall be fabricated in accordance with SMACNA Duct Construction Standards Metal and Flexible. 5. The use of gypsum products to construct return air ducts or plenums is permitted, provided that the air temperature does not exceed 125°F (52°C) and exposed surfaces are not subject to condensation. Continued on next page

13. M1601.4 Duct Installation CHANGE TYPE: Modification 2015 CODE: M1601.4 Installation. Duct installation shall comply with Sections M1601.4.1 through M1601.4.910. Changes include: UL Listing 181 for tapes and sealants Crimped joints not less than 1 inch Factory made duct listed by UL 181 shall be supported per SMACNA or NAIMA

14. M1602 Return Air CHANGE TYPE: Modification M1602.2 Return Air Openings. Return air openings for heating, ventilation and air-conditioning systems shall comply with all of the following: 1. Openings shall not be located less than 10 feet (3048 mm) measured in any direction from an open combustion chamber or draft hood of another appliance located in the same room or space. 2. The amount of return air taken from any room or space shall be not greater than the flow rate of supply air delivered to such room or space. 3. Return and transfer openings shall be sized in accordance with the appliance or equipment manufacturers’ installation instructions, Manual D or the design of the registered design professional. 4. Return air shall not be taken from a closet, bathroom, toilet room, kitchen, garage, mechanical room, boiler room, furnace room or unconditioned attic. Exceptions: 1. Taking return air from a kitchen is not prohibited where such return air openings serve the kitchen only, and are located not less than 10 feet (3048 mm) from the cooking appliances. 2. Dedicated forced-air systems serving only a the garage shall not be prohibited from obtaining return air from the garage. 3. Taking return air from an unconditioned crawl space shall not be accomplished through a direct connection to the return side of a forced-air furnace. Transfer openings in the crawl space enclosure shall not be prohibited. 4. Return air from one dwelling unit shall not be discharged into another dwelling unit.

15. 7-2.2 Technical Codes Adopted (B)(1) (H)Section M1503.4 shall be changed to allow for short circuiting of kitchen hoods, >400 CFM, with the use of interlocked makeup air dampers.

16. Table of contents G2404.11 Condensate Pumps G2411.1.1 Electrical Bonding of Corrugated Stainless Steel Tubing G2413.2 Maximum Gas Demand G2414.6 Plastic Pipe, Tubing and Fittings G2415.5 Fittings in Concealed Locations G2415.7 Protection of Concealed Piping Against Physical Damage G2421.2 Medium-Pressure Regulators G2422.1 Connecting Portable and Movable Appliances G2426.7.1 Door Clearance to Vent Terminals G2427.4.1, G2427.6.8.3 Plastic Piping for Appliance Vents G2427.8 Venting System Termination Location G2439.4, G2439.7 Clothes Dryer Exhaust Ducts G2447.2 Prohibited Location of Commercial Cooking Appliances

17. G2404.11 Condensate Pumps CHANGE TYPE: Addition 2015 CODE: G2404.11 (307.6) Condensate Pumps. Condensate pumps located in uninhabitable spaces, such as attics and crawl spaces, shall be connected to the appliance or equipment served such that when the pump fails, the appliance or equipment will be prevented from operating. Pumps shall be installed in accordance with the manufacturer’s instructions.

18. G2411.1.1 Electrical Bonding of Corrugated Stainless Steel Tubing CHANGE TYPE: Modification 2015 CODE: G2411.1.1 (310.1.1) CSST. Corrugated stainless steel tubing (CSST) gas piping systems and piping systems containing one or more segments of CSST shall be bonded to the electrical service grounding electrode system or, where provided, the lightning protection electrode system. The bonding jumper shall connect to a metallic pipe or fitting between the point of delivery and the first downstream CSST fitting. The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. Gas piping systems that contain one or more segments of CSST shall be bonded in accordance with this section. Continued on next page

19. G2411.1.1 Electrical Bonding of Corrugated Stainless Steel Tubing G2411.1.1.1 (310.1.1.1) Point of Connection. The bonding jumper shall connect to a metallic pipe, pipe fitting or CSST fitting. G2411.1.1.2 (310.1.1.2) Size and Material of Jumper. The bonding jumper shall be not smaller than 6 AWG copper wire or equivalent. G2411.1.1.3 (310.1.1.3) Bonding Jumper Length. The length of the bonding jumper between the connection to a gas piping system and the connection to a grounding electrode system shall not exceed 75 feet (22 860 mm). Any additional grounding electrodes used shall be bonded to the electrical service grounding electrode system or, where provided, the lightning protection grounding electrode system. G2411.1.1.4 (310.1.1.4) Bonding Connections. Bonding connections shall be in accordance with NFPA 70. G2411.1.1.5 (310.1.1.5) Connection Devices. Devices used for making the bonding connections shall be listed for the application in accordance with UL 467.

20. G2413.2 Maximum Gas Demand 2015 CODE G2413.2 (402.2) Maximum Gas Demand. The volumetric flow rate of gas to be provided, in cubic feet per hour, shall be the sum of the maximum input calculated using the manufacturer’s input ratings of the appliances served adjusted for altitude. Where an input rating is not indicated, the gas supplier, appliance manufacturer or a qualified agency shall be contacted, or the rating from Table 402.2 shall be used for estimating the volumetric flow rate of gas to be supplied. The total connected hourly load shall be used as the basis for pipe sizing, assuming that all appliances could be operating at full capacity simultaneously. Where a diversity of load can be established, pipe sizing shall be permitted to be based on such loads. The volumetric flow rate of gas to be provided shall be adjusted for altitude where the installation is above 2,000 feet (610 m) in elevation. CHANGE TYPE: Modification

21. G2414.6 Plastic Pipe, Tubing, & Fittings CHANGE TYPE: Modification 2015 CODE: G2414.6 (403.6) Plastic Pipe, Tubing and Fittings. Polyethylene plastic pipe, tubing and fittings used to supply fuel gas shall conform to ASTM D 2513. Such pipe shall be marked “Gas” and “ASTM D 2513.” Plastic pipe, tubing and fittings, other than polyethylene, shall be identified and conform to the 2008 edition of ASTM D 2513. Such pipe shall be marked “Gas” and “ASTM D 2513.” Polyvinyl chloride (PVC) and chlorinated polyvinyl chloride (CPVC) plastic pipe, tubing and fittings shall not be used to supply fuel gas.

22. G2415.5 Fittings in Concealed Locations CHANGE TYPE: Clarification 2015 CODE: G2415.5 (404.5) Fittings Piping in Concealed Locations. Portions of a piping Fittings installed in concealed locations shall not have unions, tubing fittings, right and left couplings, bushings, compression couplings and swing joints made by combinations of fittings be limited to the following types: 1. Threaded elbows, tees and couplings 2. Brazed fittings 3. Welded fittings 4. Fittings listed to ANSI LC-1/CSA 6.26 or ANSI LC-4. Exceptions: 1. Tubing joined by brazing. 2. Fittings listed for use in concealed locations.

23. G2415.7 Protection of Concealed Piping Against Physical Damage CHANGE TYPE: Modification G2415.7 (404.7) Protection Against Physical Damage. In concealed locations, where piping other than black or galvanized steel is installed through holes or notches in wood studs, joists, rafters or similar members less than 1 1/2 inches (38 mm) from the nearest edge of the member, the pipe shall be protected by shield plates. Protective steel shield plates having a minimum thickness of 0.0575 inch (1.463 mm) (No. 16 gage) shall cover the area of the pipe where the member is notched or bored and shall extend a minimum of 4 inches (102 mm) above sole plates, below top plates and to each side of a stud, joist or rafter. Where piping will be concealed within light-frame construction assemblies, the piping shall be protected against penetration by fasteners in accordance with Sections G2415.7.1 through G2415.7.3. Exception: Black steel piping and galvanized steel piping shall not be required to be protected. Continued on next page

24. G2415.7 Protection of Concealed Piping Against Physical Damage G2415.7.1 (404.7.1) Piping Through Bored Holes or Notches. Where piping is installed through holes or notches in framing members and the piping is located less than 1½ inches (38 mm) from the framing member face to which wall, ceiling or floor membranes will be attached, the pipe shall be protected by shield plates that cover the width of the pipe and the framing member and that extend not less than 4 inches (51 mm) to each side of the framing member. Where the framing member that the piping passes through is a bottom plate, bottom track, top plate or top track, the shield plates shall cover the framing member and extend not less than 4 inches (51 mm) above the bottom framing member and not less than 4 inches (51 mm) below the top framing member. G2415.7.2 (404.7.2) Piping Installed in Other Locations. Where the piping is located within a framing member and is less than 1½ inches (38 mm) from the framing member face to which wall, ceiling or floor membranes will be attached, the piping shall be protected by shield plates that cover the width and length of the piping. Where the piping is located outside of a framing member and is located less than 1½ inches (38 mm) from the nearest edge of the face of the framing member to which the membrane will be attached, the piping shall be protected by shield plates that cover the width and length of the piping G2415.7.3 (404.7.3) Shield Plates. Shield plates shall be of steel material having a thickness of not less than 0.0575 inch (1.463 mm) (No. 16 gage). Continued on next page

25. G2421.2 Medium-Pressure Regulators CHANGE TYPE: Modification G2421.2 (410.2) MP Regulators. MP pressure regulators shall comply with the following: 1. The MP regulator shall be approved and shall be suitable for the inlet and outlet gas pressures for the application. 2. The MP regulator shall maintain a reduced outlet pressure under lockup (no-flow) conditions. 3. The capacity of the MP regulator, determined by published ratings of its manufacturer, shall be adequate to supply the appliances served. 4. The MP pressure regulator shall be provided with access. Where located indoors, the regulator shall be vented to the outdoors or shall be equipped with a leak-limiting device, in either case complying with Section G2421.3. 5. A tee fitting with one opening capped or plugged shall be installed between the MP regulator and its upstream shutoff valve. Such tee fitting shall be positioned to allow connection of a pressure-measuring instrument and to serve as a sediment trap. 6. A tee fitting with one opening capped or plugged shall be installed not less than 10 pipe diameters downstream of the MP regulator outlet. Such tee fitting shall be positioned to allow connection of a pressure-measuring instrument. 7. Where connected to rigid piping, a union shall be installed within 1 foot (304 mm) of either side of the MP regulator.

26. G2422.1 Connecting Portable and Movable Appliances CHANGE TYPE: Modification G2422.1 (411.1) Connecting Appliances. Appliances shall be connected to the piping system by one of the following: 1. Rigid metallic pipe and fittings. 2. Corrugated stainless steel tubing (CSST) where installed in accordance with the manufacturer’s instructions. 3. Listed and labeled appliance connectors in compliance with ANSI Z21.24 and installed in accordance with the manufacturer’s instructions and located entirely in the same room as the appliance. 4. Listed and labeled quick-disconnect devices used in conjunction with listed and labeled appliance connectors. 5. Listed and labeled convenience outlets used in conjunction with listed and labeled appliance connectors. 6. Listed and labeled outdoor appliance connectors in compliance with ANSI Z21.75/CSA 6.27 and installed in accordance with the manufacturer’s instructions. 7. Listed outdoor gas hose connectors in compliance with ANSI Z21.54 used to connect portable outdoor appliances. The gas hose connection shall be made only in the outdoor area where the appliance is to be used, and shall be to the gas piping supply at an appliance shutoff valve, a listed quick-disconnect device, or listed gas convenience outlet.

27. G2426.7.1 Door Clearance to Vent Terminals CHANGE TYPE: Addition G2426.7.1 (502.7.1) Door Swing. Appliance and equipment vent terminals shall be located such that doors cannot swing within 12 inches (305 mm) horizontally of the vent terminal. Door stops or closers shall not be installed to obtain this clearance.

28. G2427.4.1, G2427.6.8.3 Plastic Piping for Appliance Vents CHANGE TYPE: Modification G2427.4.1 (503.4.1) Plastic Piping. Plastic piping used for venting appliances listed for use with such venting materials shall be approved. Where plastic piping is used to vent an appliance, the appliance shall be listed for use with such venting materials and the appliance manufacturer’s installation instructions shall identify the specific plastic piping material. G2427.6.8.3 (503.6.9.3) Category II, III and IV Appliances. The sizing of gas vents for Category II, III and IV appliances shall be in accordance with the appliance manufacturer’s instructions. The sizing of plastic pipe that is specified by the appliance manufacturer as a venting material for Category II, III and IV appliances, shall be in accordance with the manufacturer’s instructions.

29. G2427.8 Venting System Termination Location CHANGE TYPE: Modification G2427.8 (503.8) Venting System Termination Location. The location of venting system terminations shall comply with the following (see Appendix C): 1. A mechanical draft venting system shall terminate at least not less than 3 feet (914 mm) above any forced-air inlet located within 10 feet (3048 mm). Exceptions: 1. This provision shall not apply to the combustion air intake of a direct-vent appliance. 2. This provision shall not apply to the separation of the integral outdoor air inlet and flue gas discharge of listed outdoor appliances. 2. A mechanical draft venting system, excluding direct-vent appliances, shall terminate at least not less than 4 feet (1219 mm) below, 4 feet (1219 mm) horizontally from, or 1 foot (305 mm) above any door, operable window, or gravity air inlet into any building. The bottom of the vent terminal shall be located at least not less than 12 inches (305 mm) above finished ground level. 3. The vent terminal of a direct-vent appliance with an input of 10,000 Btu per hour (3 kW) or less shall be located at least not less than 6 inches (152 mm) from any air opening into a building. Such an appliance with an input over 10,000 Btu per hour (3 kW) but not over 50,000 Btu per hour (14.7 kW) shall be installed with a 9-inch (230 mm) vent termination clearance, and an appliance with an input over 50,000 Btu per hour (14.7 kW) shall have at least not less than a 12-inch (305 mm) vent termination clearance. The bottom of the vent terminal and the air intake shall be located at least not less than 12 inches (305 mm) above finished ground level. 4. Through-the-wall vents for Category II and IV appliances and no categorized condensing appliances shall not terminate over public walkways or over an area where condensate or vapor could create a nuisance or hazard or could be detrimental to the operation of regulators, relief valves or other equipment. Where local experience indicates that condensate is a problem with Category I and III appliances, this provision shall also apply. Drains for condensate shall be installed in accordance with the appliance and vent manufacturers’ instructions. 5. Vent systems for Category IV appliances that terminate through an outside wall of a building and discharge flue gases perpendicular to the adjacent wall shall be located not less than 10 feet (3048 mm) horizontally from an operable opening in an adjacent building. This requirement shall not apply to vent terminals that are 2 feet (607 mm) or more above or 25 feet (7620 mm) or more below operable openings.

30. G2439.4, G2439.7 Clothes Dryer Exhaust Ducts CHANGE TYPE: Modification G2439.5.2 (614.6.2) G2439.7.2 (614.8.2) Duct Installation. Exhaust ducts shall be supported at 4-foot (1219 mm) intervals and secured in place. The insert end of the duct shall extend into the adjoining duct or fitting in the direction of airflow. Ducts shall not be joined with screws or similar fasteners that protrude more than one-eight inch (3.2 mm) into the inside of the duct.

31. G2447.2 Prohibited Location of Commercial Cooking Appliances CHANGE TYPE: Modification G2447.2 (623.2) Prohibited Location. Cooking appliances designed, tested, listed and labeled for use in commercial occupancies shall not be installed within dwelling units or within any area where domestic cooking operations occur. Exception: Appliances that are also listed as domestic cooking appliances.

32. 7-2.2 Technical Codes Adopted (B)(1) (I)Section G2404.11 shall be omitted to not allow for water shutoff devices on fuel burning appliances. (J)Section G2527 shall be omitted to say: Venting and combustion air piping for high efficiency fuel burning appliances shall be solid, schedule 40 PVC, unless prohibited by the manufacture. Where primer required, it shall be non-contrasting. (K)Section G2439.7.2 shall be amended to prohibit the use of mechanical fasteners in dryer ducts.

33. 304.1 Combustion Air for Appliances with Power Burners *307.6 Condensate Pumps *310.1.1 Electrical Bonding of Corrugated Stainless Steel Tubing *402.2 Maximum Gas Demand for Pipe Sizing *403.6 Plastic Pipe, Tubing and Fittings 403.10.4 Drilled and Tapped Metallic Pipe Fittings *404.5 Fittings in Concealed Locations *404.7 Protection of Concealed Piping against Physical Damage 404.18 Pipe Cleaning *410.2 Medium-Pressure Regulators *411.1 Connecting Portable Outdoor Appliances 411.1.1 Connectors for Commercial Cooking Appliances *502.7.1 Door Clearance to Vent Terminals *503.4.1 Plastic Piping for Appliance Vents *503.6.9.3 Sizing of Plastic Pipe Vents *503.8 Venting System Termination Location *614.5 Dryer Exhaust Duct Power Ventilators *623.2 Prohibited Location of Commercial Cooking Appliances Items marked with “*” are for reference and have been discussed earlier.

34. 304.1 Combustion Air for Appliances with Power Burners CHANGE TYPE: Modification 304.1 General. Air for combustion, ventilation and dilution of flue gases for appliances installed in buildings shall be provided by application of one of the methods prescribed in Sections 304.5 through 304.9. Where the requirements of Section 304.5 are not met, outdoor air shall be introduced in accordance with one of the methods prescribed in Sections 304.6 through 304.9. Direct- vent appliances, gas appliances of other than natural draft design, and vented gas appliances not designated as other than Category I and appliances equipped with power burners shall be provided with combustion, ventilation and dilution air in accordance with the appliance manufacturer’s instructions. Exception: Type 1 clothes dryers that are provided with makeup air in accordance with Section 614.5.

35. 403.10.4 Drilled and Tapped Metallic Pipe Fittings CHANGE TYPE: Modification 403.10.4 Metallic Fittings. Metallic fittings shall comply with the following: 1. Threaded fittings in sizes larger than 4 inches (102 mm) shall not be used except where approved. 2. Fittings used with steel or wrought-iron pipe shall be steel, copper alloy, malleable iron or cast iron. 3. Fittings used with copper or copper alloy pipe shall be copper, or copper alloy. 4. Fittings used with aluminum-alloy pipe shall be of aluminum alloy. 5. Cast-iron fittings: 5.1. Flanges shall be permitted. 5.2. Bushings shall not be used. 5.3. Fittings shall not be used in systems containing flammable gas-air mixtures. 5.4. Fittings in sizes 4 inches (102 mm) and larger shall not be used indoors except where approved. 5.5. Fittings in sizes 6 inches (152 mm) and larger shall not be used except where approved. 6. Aluminum-alloy fittings. Threads shall not form the joint seal. 7. Zinc aluminum-alloy fittings. Fittings shall not be used in systems containing flammable gas–air mixtures. 8. Special fittings. Fittings such as couplings, proprietary-type joints, saddle tees, gland-type compression fittings, and flared, flareless or compression-type tubing fittings shall be used within the fitting manufacturer’s pressure-temperature recommendations; used within the service conditions anticipated with respect to vibration, fatigue, thermal expansion or contraction; installed or braced to prevent separation of the joint by gas pressure or external physical damage; and shall be approved. 9. Where pipe fittings are drilled and tapped in the field, the operation shall be in accordance with all of the following: 9.1. The operation shall be performed on systems having operating pressures of 5 psi (34.5 kPa) or less. 9.2. The operation shall be performed by the gas supplier or the gas supplier’s designated representative. 9.3. The drilling and tapping operation shall be performed in accordance with written procedures prepared by the gas supplier. 9.4. The fittings shall be located outdoors. 9.5. The tapped fitting assembly shall be inspected and proven to be free of leakage.

36. 404.18 Pipe Cleaning CHANGE TYPE: Addition 404.18 Pipe Cleaning. The use of a flammable or combustible gas to clean or remove debris from a piping system shall be prohibited.

37. 411.1.1 Connectors for Commercial Cooking Appliances CHANGE TYPE: Modification 411.1.1 Commercial Cooking Appliances. Commercial cooking appliances installed on casters and appliances that are moved for cleaning and sanitation purposes shall be connected to the piping system with an appliance connector listed as complying with ANSI Z21.69. or in accordance with Item 1 or 3 of Section 411.1. The commercial cooking appliance connector installation shall be configured in accordance with the manufacturer’s installation instructions. Movement of appliances with casters shall be limited by a restraining device installed in accordance with the connector and appliance manufacturer’s instructions.

38. (3)The 2012 2015 Edition(s) of the International Mechanical Code and the International Fuel Gas Code as adopted by the city council shall be amended as follows: (A)Section 305 Table 305.4 of the IMC will be replaced with the IFGC Table 415.1 to provide more restrictive hanger spacing for steel pipe. (B)Sections 301.7, 306.3.1, 306.4.1, and 306.5.2 of the IMC and any reference to the “Electric Code” will be interpreted as the National Electric Code. (C)Section 307.2.3 of the IMC and Section 307.6 of the IFGC shall be omitted so as to not require water level shut-off devices. (D)Section 402 part B will be omitted and the IMC Section 403 will be used only. (E)Section 406.4.1 shall be amended to say: Pressure tests on threaded gas piping shall be 10lbs. for 15 minutes. (F)Section 503.4.1 of the IFGC shall be omitted to say: Venting and combustion air piping for high efficiency fuel burning appliances shall be solid, schedule 40 PVC, unless prohibited by the manufacture. Where primer is required, it shall not be required to be contrasting. (GF)Section 504.1 of the IMC omitting the exception for the installation of ductless clothes dryers. (H)Section 504.8.2 omitted to prohibit the use of mechanical fasteners in dryer ducts (I)Section 507.1.1 and 508.1.2 shall be omitted to allow for verification of air balancing on type 1 hoods by an engineer. (J) Section 701.2 shall include alarms for combustion air dampers, proving operation or an alternative; trapped combustion air. (KE)Section 903.3Chapter 9 of the IMC shall be omitted disallowing the installation of unvented gas appliances. (L)Section 1102.3 omitted to not require locking caps on A/C condensers.

39. 304.11 Fall-Arresting Restraint Systems 306.1 Access 307.2.5 Condensate Drain Line Maintenance *307.3 Condensate Pumps in Uninhabitable Spaces 401.2, 407.1, Table 403.3.1.1 Ventilation Required 403.2.1, Table 403.3.1.1 Recirculation of Air 403.3 Outdoor Air and Local Exhaust Airflow Rates Table 403.3.1.1 Manicure and Pedicure Station Exhaust Rate 404.1 Intermittent Operation of Mechanical Ventilation Systems for Enclosed Parking Garages 501.3 Mechanical Exhaust System Discharge 502.20 Manicure and Pedicure Station Exhaust System *504.5, 504.8.4.3 Dryer Exhaust Duct Power Ventilators *504.8.2 Dryer Exhaust Duct Installation 505.1, 505.4 Domestic Range Hoods 505.3 Domestic Kitchen Exhaust Systems in Multistory Buildings 506.3.7.1 Grease Duct Reservoirs 506.3.8 Grease Duct Cleanouts and Openings 506.3.11 Grease Duct Enclosures 506.5.1.2 In-Line Fan Location in Exhaust Ducts Serving Commercial Kitchen Hoods 506.5.3 Hinged Up-Blast Fans for Type I Hoods 507.1 Type I Hood Installation 507.1.1 Commercial Kitchen Exhaust Hood System Operation 507.1.1.1 Heat Sensors for Multiple Commercial Kitchen Hoods 507.2.8 Type I Hood Grease Filters 508.1.2 Air Balance for Commercial Kitchen Ventilation Systems 510.4, 510.5 Hazardous Exhaust Systems 510.7.1.1 Hazardous Exhaust Duct Penetrations of Shafts 514.2 Energy Recovery Ventilation Systems 601.5 Return Air Openings 602.1 Plenums Limited to One Fire Area 602.2 Plenum Construction

40. 602.2.1.5 Discrete Plumbing and Mechanical Products in Plenums *Table 603.4 Duct Construction Minimum Sheet Metal Thickness for Single Dwelling Units *603.9 Duct Joints, Seams and Connections 701.2 Dampered Openings *802.9 Door Clearance to Vent Terminals *1102.3 Refrigerant Access Port Protection

41. 304.11 Fall-Arresting Restraint Systems Change Type: Modification 304.11 guards. Guards shall be provided where various components appliances, equipment, fans or other components that require service and roof hatch openings are located within 10 feet (3048 mm) of a roof edge or open side of a walking surface and such edge or open side is located more than 30 inches (762 mm) above the floor, roof, or grade below. The guard shall extend not less than 30 inches (762 mm) beyond each end of such appliances, equipment, fans, components that require service. and roof hatch openings and the The top of the guard shall be located not less than 42 inches (1067 mm) above the elevated surface adjacent to the guard. The guard shall be constructed so as to prevent the passage of a 21-inch- diameter (533 mm) sphere and shall comply with the loading requirements for guards specified in the International Building Code. exception: Guards are not required where permanent fall arrest/ restraint anchorage connector devices that comply with ANSI/ASSE Z 359.1 are affixed for use during the entire roof covering lifetime. The devices shall be re-evaluated for possible replacement when the entirer oof covering is replaced. The devices shall be placed not more than 10 feet (3048 mm) on center along hip and ridge lines and placed not less than 10 feet (3048 mm) from the roof edge or open side of the walking surface.

42. 306.1 Access Change Type: Modification 306.1 access. Appliances, controls devices, heat exchangers and HVAC system components that utilize energy shall be accessible for inspection, service, repair and replacement without disabling the function of a fire-resistance-rated assembly or removing permanent construction, other appliances, venting systems or any other piping or ducts not connected to the appliance being inspected, serviced, repaired or replaced. A level working space at least 30 inches deep and 30 inches wide (762 mm by 762 mm) shall be provided in front of the control side to service an appliance.

43. 307.2.5 Condensate Drain Line Maintenance Change Type: Addition 307.2.5 drain line Maintenance. Condensate drain lines shall be configured to permit the clearing of blockages and performance of maintenance without requiring the drain line to be cut.

44. 401.2, 407.1, Table 403.3.1.1 Ventilation Required Change Type: Modification 401.2 Ventilation required. Every occupied space shall be ventilated by natural means in accordance with Section 402 or by mechanical means in accordance with Section 403. Where the air infiltration rate in a dwelling unit is less than 5 air changes per hour when tested with a blower door at a pressure of 0.2-inch water column (50 Pa) in accordance with Section R402.4.1.2 of the International Energy Conservation Code, the dwelling unit shall be ventilated by mechanical means in accordance with Section 403. Ambulatory care facilities and Group I-2 occupancies shall be ventilated by mechanical means in accordance with Section 407.

45. 403.2.1, Table 403.3.1.1 Recirculation of Air Change Type: Clarification 403.2.1 recirculation of air. The outdoor air required by Section 403.3 shall not be recirculated. Air in excess of that required by Section 403.3 shall not be prohibited from being recirculated as a component of supply air to building spaces, except that: 1. Ventilation air shall not be recirculated from one dwelling to another or to dissimilar occupancies. 2. Supply air to a swimming pool and associated deck areas shall not be recirculated unless such air is dehumidified to maintain the relative humidity of the area at 60 percent or less. Air from this area shall not be recirculated to other spaces where more than 10 percent of the resulting supply airstream consists of air recirculated from these spaces. Continued on next page 3. Where mechanical exhaust is required by note b in Table 403.3.1.1, recirculation of air from such spaces shall be prohibited. Recirculation of air that is contained completely within such spaces shall not be prohibited. Where recirculation of air is prohibited, all air supplied to such spaces shall be exhausted, including any air in excess of that required by Table 403.3.1.1. 4. Where mechanical exhaust is required by note g in Table 403.3.1.1, mechanical exhaust is required and recirculation from such spaces is prohibited where more than 10 percent of the resulting supply airstream consists of air recirculated from these spaces. Recirculation of air that is contained completely within such spaces shall not be prohibited.

46. Table 403.3.1.1 Minimum Ventilation Rates

47. 403.3 Outdoor Air and Local Exhaust Airflow Rates Change Type: Addition 403.3 outdoor air and local exhaust airflow rates. Group R-2, R-3 and R-4 occupancies three stories and less in height above grade plane shall be provided with outdoor air and local exhaust in accordance with Section 403.3.2. All other buildings intended to be occupied shall be provided with outdoor air and local exhaust in accordance with Section 403.3.1. 403.3.1 other buildings Intended to be occupied. The design of local exhaust systems and ventilation systems for outdoor air for occupancies other than Group R-2, R-3 and R-4 three stories and less above grade plane, shall comply with Sections 403.3.1.1 through 403.3.1.5. 403.3.2 r-2, r-3 and r-4 occupancies, Three Stories and less. The design of local exhaust systems and ventilation systems for outdoor air in R-2, R-3 and R-4 occupancies three stories and less in height above grade plane shall comply with Sections 403.3.2.1 through 403.3.2.3. 403.3.2.1 outdoor air for dwelling units. An outdoor air ventilation system consisting of a mechanical exhaust system, supply system or combination thereof shall be installed for each dwelling unit. Local exhaust or supply systems, including outdoor air ducts connected to the return side of an air handler, are permitted to serve as such a system. The outdoor air ventilation system shall be designed to provide the required rate of outdoor air continuously during the period that the building is occupied. The minimum continuous outdoor airflow rate shall be determined in accordance with Equation 4-9. Continued on next page

48. 403.3 Outdoor Air and Local Exhaust Airflow Rates exception: The outdoor air ventilation system is not required to operate continuously where the system has controls that enable operation for not less than 1 hour of each 4-hour period. The average outdoor airflow rate over the 4-hour period shall be not less than that prescribed by Equation 4-9. 403.3.2.2 outdoor air for other Spaces. Corridors and other common areas within the conditioned space shall be provided with outdoor air at a rate of not less than 0.06 cfm/ft 2 of floor area. 403.3.2.3 local exhaust. Local exhaust systems shall be provided in kitchens, bathrooms and toilet rooms and shall have the capacity to exhaust the minimum airflow rate determined in accordance with Table 403.3.2.3.

49. Table 403.3.1.1 Manicure and Pedicure Station Exhaust Rate Change Type: Modification

50. 404.1 Intermittent Operation of Mechanical Ventilation Systems for Enclosed Parking Garages Change Type: Modification 404.1 enclosed parking garages. Where mechanical ventilation systems for enclosed parking garages shall be permitted to operate intermittently, such operation shall be automatic in accordance with Item 1, Item 2 or both by means of carbon monoxide detectors applied in conjunction with nitrogen dioxide detectors. Such detectors shall be installed in accordance with their manufacturers’ recommendations. 1. The system shall be arranged to operate automatically upon detection of vehicle operation or the presence of occupants by approved automatic detection devices. 2. The system shall be arranged to operate automatically by means of carbon monoxide detectors applied in conjunction with nitrogen dioxide detectors. Such detectors shall be installed in accordance with their manufacturers’ recommendations.

51. 501.3 Mechanical exhaust System Discharge Change Type: Modification 501.3 exhaust discharge. The air removed by every mechanical exhaust system shall be discharged outdoors at a point where it will not cause a public nuisance and not less than the distances specified in Section 501.3.1. The air shall be discharged to a location from which it cannot again be readily drawn in by a ventilating system. Air shall not be exhausted into an attic, crawl space, or be directed onto walkways. exceptions: 1. Whole-house ventilation-type attic fans shall be permitted to discharge into the attic space of dwelling units having private attics. 2. Commercial cooking recirculating systems. 3. Where installed in accordance with the manufacturer’s instructions and where mechanical or natural ventilation is otherwise provided in accordance with Chapter 4, listed and labeled domestic ductless range hoods shall not be required to discharge to the outdoors.

52. 502.20 Manicure and Pedicure Station Exhaust System Change Type: Addition 502.20 Manicure and pedicure Stations. Manicure and pedicure stations shall be provided with an exhaust system in accordance with Table 403.3.1.1, note h. Manicure tables and pedicure stations not provided with factory-installed exhaust inlets shall be provided with exhaust inlets located not more than 12 inches horizontally and vertically from the point of chemical application.

53. 505.1, 505.4 Domestic Range Hoods Change Type: Modification 505.1 domestic Systems. Where domestic range hoods and domestic appliances equipped with downdraft exhaust are located within dwelling units provided, such hoods and appliances shall discharge to the outdoors through sheet metal ducts constructed of galvanized steel, stainless steel, aluminum or copper. Such ducts shall have smooth inner walls, shall be air tight, shall be equipped with a backdraft damper, and shall be independent of all other exhaust systems. exceptions: 1. In other than Group I-1 and I-2, where installed in accordance with the manufacturer’s installation instructions and where mechanical or natural ventilation is otherwise provided in accordance with Chapter 4, listed and labeled ductless range hoods shall not be required to discharge to the outdoors. 2. Ducts for domestic kitchen cooking appliances equipped with downdraft exhaust systems shall be permitted to be constructed of Schedule 40 PVC pipe and fittings provided that the installation complies with all of the following: 2.1. The duct shall be installed under a concrete slab poured on grade. 2.2. The underfloor trench in which the duct is installed shall be completely backfilled with sand or gravel. 2.3. The PVC duct shall extend not more than 1 inch (25 mm) above the indoor concrete floor surface. 2.4. The PVC duct shall extend not more than 1 inch (25 mm) above grade outside of the building. 2.5. The PVC ducts shall be solvent cemented. 505.4 Other than group R. In other than Group R occupancies, where domestic cooking appliances are utilized for domestic purposes, such appliances shall be provided with domestic range hoods. Hoods and exhaust systems shall be in accordance with Sections 505.1 and 505.2.

54. 505.3 Domestic Kitchen Exhaust Systems in Multistory Buildings Change Type: Addition 505.3 Common exhaust Systems for domestic Kitchens located in Multistory Structures. Where a common multistory duct system is designed and installed to convey exhaust from multiple domestic kitchen exhaust systems, the construction of the system shall be in accordance with all of the following: 1. The shaft in which the duct is installed shall be constructed and fire resistance rated as required by the International Building Code. 2. Dampers shall be prohibited in the exhaust duct, except as specified in Section 505.1. Penetrations of the shaft and ductwork shall be protected in accordance with Section 607.5.5, exception 2. 3. Rigid metal ductwork shall be installed within the shaft to convey the exhaust. The ductwork shall be constructed of sheet steel having a minimum thickness of 0.0187 inch (0.4712 mm) (No. 26 gage) and in accordance with SMACNA Duct Construction Standards. 4. The ductwork within the shaft shall be designed and installed without offsets. 5. The exhaust fan motor design shall be in accordance with Section 503.2. 6. The exhaust fan motor shall be located outside of the airstream. 7. The exhaust fan shall run continuously, and shall be connected to a standby power source. 8. Exhaust fan operation shall be monitored in an approved location and shall initiate an audible or visual signal when the fan is not in operation. 9. Where the exhaust rate for an individual kitchen exceeds 400 cfm (0.19 m 3/s) makeup air shall be provided in accordance with Section 505.2. 10. A cleanout opening shall be located at the base of the shaft to provide access to the duct to allow for cleanout and inspection. The finished openings shall be not less than 12 inches by 12 inches (305 mm by 305 mm). 11. Screens shall not be installed at the termination. 12. The common multistory duct system shall serve only kitchen exhaust and shall be independent of other exhaust systems. Continued on next page

55. 505.3 Domestic Kitchen Exhaust Systems in Multistory Buildings

56. 506.3.7.1 Grease Duct Reservoirs Change Type: Modification 506.3.7.1 grease duct reservoirs. Grease duct reservoirs shall: 1. Be constructed as required for the grease duct they serve. 2. Be located on the bottom of the horizontal duct or the bottommost section of the duct riser. 3. Have a length and width of not less than 12 inches (305 mm). Where the grease duct is less than 12 inches (305 mm) in a dimension, the reservoir shall be not more than 2 inches (51 mm) smaller than the duct in that dimension. 3. Extend across the full width of the duct and have a length of not less than 12 inches. 4. Have a depth of not less than 1 inch (25.4 mm). 5. Have a bottom that is sloped to a point for drainage. slopes to a drain. 6. Be provided with a cleanout opening constructed in accordance with Section 506.3.8 and installed to provide direct access to the reservoir. The cleanout opening shall be located on a side or on top of the duct so as to permit cleaning of the reservoir. 7. Be installed in accordance with the manufacturer’s instructions where manufactured devices are utilized.

57. 506.3.8 Grease Duct Cleanouts and Openings Change Type: Modification 2015 Code: 506.3.8 grease duct Cleanouts and openings. Grease duct cleanouts and openings shall comply with all of the following: 1. Grease ducts shall not have openings except where required for the operation and maintenance of the system. 2. Sections of grease ducts that are inaccessible from the hood or discharge openings shall be provided with cleanout openings spaced not more than 20 feet apart and not more than 10 feet from changes in direction greater than 45 degrees. 3. Cleanouts and openings shall be equipped with tight-fitting doors constructed of steel having a thickness not less than that required for the duct. 4. Cleanout doors shall be installed liquid tight. 5. Door assemblies including any frames and gaskets shall be approved for the application and shall not have fasteners that penetrate the duct. 6. Gasket and sealing materials shall be rated for not less than 1500°F (816°C). 7. Listed door assemblies shall be installed in accordance with the manufacturer’s instructions.

58. 506.3.11 Grease Duct Enclosures Change Type: Modification 506.3.11 grease duct enclosures. A commercial kitchen grease duct serving a Type I hood that penetrates a ceiling, wall, floor or any concealed spaces shall be enclosed from the point of penetration to the outlet terminal. In-line exhaust fans not located outdoors shall be enclosed as required for grease ducts. A duct shall penetrate exterior walls only at locations where unprotected openings are permitted by the International Building Code. The duct enclosure shall serve a single grease duct and shall not contain other ducts, piping or wiring systems. Duct enclosures shall be either a shaft enclosure in accordance with Section 506.3.11.1, a field-applied enclosure assembly in accordance with 506.3.11.2 or a factory-built enclosure assembly in accordance with Section 506.3.11.3. Duct enclosures shall have a fire- resistance rating of not less than that of the assembly penetrated and not less than 1 hour. Fire dampers and smoke dampers shall not be installed in grease ducts. Duct enclosures shall be as prescribed by Section 506.3.11.1, 506.3.11.2 or 506.3.11.3. 506.3.11.4 duct enclosure not required. exception: A duct enclosure shall not be required for a grease duct that penetrates only a non-fire-resistance- rated roof/ceiling assembly.

59. 506.5.1.2 In-line Fan Location in Exhaust Ducts Serving Commercial Kitchen Hoods Change Type: Addition 506.5.1.2 In-line fan location. Where enclosed duct systems are connected to in-line fans not located outdoors, the fan shall be located in a room or space having the same fire resistance rating as the duct enclosure. Access shall be provided for servicing and cleaning of fan components. Such rooms or spaces shall be ventilated in accordance with the fan manufacturers’ installation instructions.

60. 506.5.3 Hinged Up-Blast Fans for Type I hoods Change Type: Modification 506.5.3 exhaust fan Mounting. An Up-blast fans serving Type I hoods and installed in a vertical or horizontal position shall be hinged, and supplied with a flexible weatherproof electrical cable to permit inspection and cleaning and shall be equipped with a means of restraint to limit the swing of the fan on its hinge. The ductwork shall extend a minimum of 18 inches (457 mm) above the roof surface.

61. Change Type: Modification 507.1 general. Commercial kitchen exhaust hoods shall comply with the requirements of this section. Hoods shall be Type I or II and shall be designed to capture and confine cooking vapors and residues. A Type I or Type II hood shall be installed at or above all commercial cooking appliances in accordance with Sections 507.2 and 507.3. Where any cooking appliance under a single hood requires a Type I hood, a Type I hood shall be installed. Where a Type II hood is required, a Type I or Type II hood shall be installed. Where a Type I hood is installed, the installation of the entire system, including the hood, ducts, exhaust equipment and makeup air system shall comply with the requirements of Sections 506, 507, 508 and 509. Commercial kitchen exhaust hood systems shall operate during the cooking operation. 507.1 Type I hood Installation

62. 507.1.1 Commercial Kitchen Exhaust Hood System Operation Change Type: Modification 507.2.1.1 507.1.1 operation. Commercial kitchen exhaust hood systems shall operate during the cooking operation. The hood exhaust rate shall comply with the listing of the hood or shall comply with Section 507.5. Type I hood systems shall be designed and installed to automatically activate the exhaust fan whenever cooking operations occur. The activation of the exhaust fan shall occur through an interlock with the cooking appliances, by means of heat sensors or by means of other approved methods. The exhaust fan serving a Type I hood shall have automatic controls that will activate the fan when any appliance that requires such Type I Hood is turned on, or a means of interlock shall be provided that will prevent operation of such appliances when the exhaust fan is not turned on. Where one or more temperature or radiant energy sensors are used to activate a Type I hood exhaust fan, the fan shall activate not more than 15-minutes after the first appliance, served by that hood, has been turned on. A method of interlock between an exhaust hood system and appliances equipped with standing pilot burners shall not cause the pilot burners to be extinguished. A method of interlock between an exhaust hood system and cooking appliances shall not involve or depend upon any component of a fire extinguishing system. The net exhaust volumes for hoods shall be permitted to be reduced during part-load cooking conditions, where engineered or listed multispeed or variable speed controls automatically operate the exhaust system to maintain capture and removal of cooking effluents as required by this section. Reduced volumes shall not be below that required to maintain capture and removal of effluents from the idle cooking appliances that are operating in a standby mode.

63. 507.1.1.1 Heat Sensors for Multiple Commercial Kitchen Hoods Change Type: Addition 507.1.1.1 Multiple hoods utilizing a Single exhaust System. Where heat or radiant energy sensors are utilized in hood systems consisting of multiple hoods served by a single exhaust system, such sensors shall be provided in each hood. Sensors shall be capable of being accessed from the hood outlet or from a cleanout location.

64. 507.2.8 Type I Hood Grease Filters Change Type: Modification 507.11 507.2.8 Type I grease filters. Type I hoods shall be equipped with grease filters listed and labeled in accordance with UL 1046 and designed for the specific purpose. Grease-collecting equipment filters shall be provided with access for cleaning or replacement. The lowest edge of a grease filter located above the cooking surface shall be not less than the height specified in Table 507.11 507.2.8.

65. 508.1.2 Air Balance for Commercial Kitchen Ventilation Systems Change Type: Addition 508.1.2 air balance. Design plans for a facility with a commercial kitchen ventilation system shall include a schedule or diagram indicating the design outdoor air balance. The design outdoor air balance shall indicate all exhaust and replacement air for the facility, plus the net exfiltration if applicable. The total replacement air airflow rate shall equal the total exhaust airflow rate plus the net exfiltration.

66. 510.4, 510.5 Hazardous Exhaust Systems Change Type: Modification 510.4 Independent System. Hazardous exhaust systems shall be independent of other types of exhaust systems. Incompatible materials, as defined in the International Fire Code, shall not be exhausted through the same hazardous exhaust system. Hazardous exhaust systems shall not share common shafts with other duct systems, except where such systems are hazardous exhaust systems originating in the same fire area. exception: The provision of this section shall not apply to laboratory exhaust systems where all of the following conditions apply: 1. All of the hazardous exhaust ductwork and other laboratory exhaust within both the occupied space and the shafts are under negative pressure while in operation. 2. The hazardous exhaust ductwork manifolded together within the occupied space must originate within the same fire area. 3. Each control branch has a flow regulating device. 4. Perchloric acid hoods and connected exhaust shall be prohibited from manifolding. Continued on next page 5. Radioisotope hoods are equipped with filtration and/or carbon beds where required by the registered design professional. 6. Biological safety cabinets are filtered. 7. Provision is made for continuous maintenance of negative static pressure in the ductwork. Contaminated air shall not be recirculated to occupiable areas. Air containing explosive or flammable vapors, fumes or dusts; flammable, highly toxic or toxic gases; or radioactive material shall be considered to be contaminated. 510.5 Incompatible Materials and Common Shafts. Incompatible materials, as defined in the International Fire Code, shall not be exhausted through the same hazardous exhaust system. Hazardous exhaust systems shall not share common shafts with other duct systems, except where such systems are hazardous exhaust systems originating in the same fire area. exception: The provisions of this section shall not apply to laboratory exhaust systems where all of the following conditions apply: 1. All of the hazardous exhaust ductwork and other laboratory exhaust within both the occupied space and the shafts are under negative pressure while in operation. 2. The hazardous exhaust ductwork manifolded together within the occupied space must originate within the same fire area. 3. Hazardous exhaust ductwork originating in different fire areas and manifolded together in a common shaft shall meet the provisions of Section 717.5.3, Exception 1.1 of the International Building Code. 4. Each control branch has a flow regulating device.

67. 510.4, 510.5 Hazardous Exhaust Systems 5. Perchloric acid hoods and connected exhaust shall be prohibited from manifolding. 6. Radioisotope hoods are equipped with filtration and/or carbon beds where required by the registered design professional. 7. Biological safety cabinets are filtered. 8. Each hazardous exhaust duct system shall be served by redundant exhaust fans that comply with either of the following: 8.1 The fans shall operate simultaneously in parallel and each fan shall be individually capable of providing the required exhaust rate. 8.2 Each of the redundant fans is controlled so as to operate when the other fan has failed or is shut down for servicing.

68. 510.7.1.1 Hazardous Exhaust Duct Penetrations of Shafts Change Type: Addition 510.7.1.1 Hazardous exhaust ducts that penetrate fireresistance-rated shafts shall comply with Section 714.3.1 or 714.3.1.2 of the International Building Code.

69. 514.2 Energy Recovery Ventilation Systems Change Type: Modification 514.2 prohibited applications. Energy recovery ventilation systems shall not be used in the following systems: 1. Hazardous exhaust systems covered in Section 510. 2. Dust, stock and refuse systems that convey explosive or flammable vapors, fumes or dust. 3. Smoke control systems covered in Section 513. 4. Commercial kitchen exhaust systems serving Type I and Type II hoods. 5. Clothes dryer exhaust systems covered in Section 504. exception: The application of ERV equipment that recovers sensible heat only utilizing coil-type heat exchangers shall not be limited by this section.

70. 601.5 Return Air Openings Change Type: Addition 601.5 return air openings. Return air openings for HVAC systems shall comply with all of the following: 1. Openings shall not be located less than 10 feet measured in any direction from an open combustion chamber or draft hood of another appliance located in the same room or space. 2. Return air shall not be taken from a hazardous or insanitary location or a refrigeration room as defined in this code. 3. The amount of return air taken from any room or space shall be not greater than the flow rate of supply air delivered to such room or space. 4. Return and transfer openings shall be sized in accordance with the appliance or equipment manufacturers installation instructions, ACCA Manual D or the design of the registered design professional. Continued on next page

71. 601.5 Return Air Openings 5. Return air taken from one dwelling unit shall not be discharged into another dwelling unit. 6. Taking return air from a crawl space shall not be accomplished through a direct connection to the return side of a forced air furnace. Transfer openings in the crawl space enclosure shall not be prohibited. 7. Return air shall not be taken from a closet, bathroom, toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic. exceptions: 1. Taking return air from a kitchen is not prohibited where such return air openings serve the kitchen and are located not less than 10 feet from the cooking appliances. 2. Dedicated forced air systems serving only the garage shall not be prohibited from obtaining return air from the garage. Continued on next page 5. Return air taken from one dwelling unit shall not be discharged into another dwelling unit. 6. Taking return air from a crawl space shall not be accomplished through a direct connection to the return side of a forced air furnace. Transfer openings in the crawl space enclosure shall not be prohibited. 7. Return air shall not be taken from a closet, bathroom, toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic. exceptions: 1. Taking return air from a kitchen is not prohibited where such return air openings serve the kitchen and are located not less than 10 feet from the cooking appliances. 2. Dedicated forced air systems serving only the garage shall not be prohibited from obtaining return air from the garage.

72. 601.5 Return Air Openings 918.6 prohibited Sources. Outdoor or return air for forced-air heating and cooling systems shall not be taken from the following locations: 1. Less than 10 feet (3048 mm) from an appliance vent outlet, a vent opening from a plumbing drainage system or the discharge outlet of an exhaust fan, unless the outlet is 3 feet (914 mm) above the outdoor air inlet. 2. Where there is the presence of objectionable odors, fumes or flammable vapors; or where located less than 10 feet (3048 mm) above the surface of any abutting public way or driveway; or where located at grade level by a sidewalk, street, alley or driveway. 3. A hazardous or insanitary location or a refrigeration machinery room as defined in this code. 4. A room or space, the volume of which is less than 25 percent of the entire volume served by such system. Where connected by a permanent opening having an area sized in accordance with Sections 918.2 and 918.3, adjoining rooms or spaces shall be considered as a single room or space for the purpose of determining the volume of such rooms or spaces. exception: The minimum volume requirement shall not apply where the amount of return air taken from a room or space is less than or equal to the amount of supply air delivered to such room or space. 5. A closet, bathroom, toilet room, kitchen, garage, boiler room, furnace room or unconditioned attic. exceptions: 5.1. Where return air intakes are located not less than 10 feet (3048 mm) from cooking appliances, and serve the kitchen area only, taking return air from a kitchen shall not be prohibited. 5.2. Dedicated forced-air systems serving only a garage shall not be prohibited from obtaining return air from the garage. 6. An unconditioned crawl space by means of direct connection to the return side of a forced air system. Transfer openings in the crawl space enclosure shall not be prohibited. 7. A room or space containing a fuel-burning appliance where such room or space serves as the sole source of return air. exceptions: 7.1. This shall not apply where the fuel-burning appliance is a direct-vent appliance. 7.2. This shall not apply where the room or space complies with the following requirements: 7.2.1. The return air shall be taken from a room or space having a volume exceeding 1 cubic foot for each 10 Btu/h (9.6 L/W) of combined input rating of all fuel-burning appliances therein. 7.2.2. The volume of supply air discharged back into the same space shall be approximately equal to the volume of return air taken from the space. 7.2.3. Return-air inlets shall not be located within 10 feet (3048 mm) of any appliance firebox or draft hood in the same room or space. 7.3. This shall not apply to rooms or spaces containing solid-fuel- burning appliances, provided that returnair inlets are located not less than 10 feet (3048 mm) from the firebox of the appliances.

73. 602.1 Plenums Limited to One Fire Area Change Type: Clarification 602.1 general. Supply, return, exhaust, relief and ventilation air plenums shall be limited to uninhabited crawl spaces, areas above a ceiling or below the floor, attic spaces and mechanical equipment rooms. Plenums shall be limited to one fire area. Air systems shall be ducted from the boundary of the fire area served directly to the air handling equipment. Fuel-fired appliances shall not be installed within a plenum.

74. 602.2 Plenum Construction Change Type: Modification 602.2 Construction. Plenum enclosures shall be constructed of materials permitted for the type of construction classification of the building. Plenum enclosure construction materials that are exposed to the airflow shall comply with the requirements of Section 703.5 of the International Building Code or such materials shall have a flame spread index of not more than 25 and a smoke-developed index of not more than 50 when tested in accordance with ASTM E 84 or UL 723. The use of gypsum boards to form plenums shall be limited to systems where the air temperatures do not exceed 125°F (52°C) and the building and mechanical system design conditions are such that the gypsum board surface temperature will be maintained above the airstream dew-point temperature. Air plenums formed by gypsum boards shall not be incorporated in air-handling systems utilizing evaporative coolers.

75. 602.2.1.5 Discrete Plumbing and Mechanical Products in Plenums Change Type: Addition 602.2.1.5 discrete plumbing and Mechanical products in plenums. Where discrete plumbing and mechanical products and appurtenances are located in a plenum and have exposed combustible material, they shall be listed and labeled for such use in accordance with UL 2043.

76. 701.2 Dampered Openings Change Type: Addition 701.2 dampered openings. Where combustion air openings are provided with volume, smoke or fire dampers, the dampers shall be interlocked with the firing cycle of the appliances served, so as to prevent operation of any appliance that draws combustion air from the room or space when any of the dampers are closed. Manual dampers shall not be installed in combustion air ducts. Ducts not provided with dampers and that pass through rated construction shall be enclosed in a shaft in accordance with the International Building Code.

77. 903.4 Gasketed Fireplace Doors Change Type: Addition 903.4 gasketed fireplace doors. A gasketed fireplace door shall not be installed on a factory-built fireplace except where the fireplace system has been specifically tested, listed and labeled for such use in accordance with UL 127.

78. To Be Continued……. At Another Code Cycle