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EXHAUSTO - Presentation. Sub Title The First Fan - 1957 The first chimney fan - a first worldwide and the foundation of EXHAUSTOs existence.

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Presentation on theme: "EXHAUSTO - Presentation. Sub Title The First Fan - 1957 The first chimney fan - a first worldwide and the foundation of EXHAUSTOs existence."— Presentation transcript:

1 EXHAUSTO - Presentation

2 Sub Title The First Fan The first chimney fan - a first worldwide and the foundation of EXHAUSTOs existence

3 Sub Title A 50-year Old Company Founded in ,000+ sq.ft. of manufacturing and administration Family-owned, well- managed with a very strong balance sheet. High-tech ISO 9001 certified manufacturing facilities

4 Sub Title A Look Into the Plant

5 Sub Title Automation Via Robots

6 Sub Title Certifications

7 Worldwide Distribution Subsidiaries in USA, England, Germany, Norway and Sweden Authorized distributors in Belgium, Netherlands, Finland, France, Iceland, Switzerland, Spain, Austria and Japan.

8 Sub Title EXHAUSTO in North America In Atlanta since ,000 sq.ft. office and warehouse 86 authorized sales and service offices in USA and Canada.

9 Sub Title EXHAUSTO in North America 95% of products are in stock ready for immediate shipping. Inventory level of $800-1,000,000 Complete parts inventory

10 Sub Title Code Development and Publication Involved in code and standard development (NFPA 54, NFPA 211 etc.) Publish articles about venting and venting design. Make over 30 presentations at regional ASHRAE chapters and other organizations every year. Training and education of Building Officials.

11 EXHAUSTO: Venting Design

12 Appliance Categories ASHRAE Equation & Chimney Pressures Common Code Violations Chimney Automation Systems Combustion Air Supply Boiler Room Simulator Overdraft Damper System Dryer Venting

13 Sub Title ANSI Venting Categorization Appliance Categories

14 Sub Title Appliance Categorization IV III II I Atmospheric Fan Assisted (high efficiency) Forced Draft Condensing Draft Hood Fan Assisted Draft Diverter Scotch Marine Negative Positive

15 Sub Title Acceptable Venting Material IV III II I Atmospheric Fan Assisted (85+ efficiency) Forced Draft Condensing B-Vent Masonry Fan Assisted B-Vent Masonry (interior) AL29-4C double wall UL103 P-Stack Welded Steel (90+ efficiency) AL29-4C single wall CPVC (tested with appliance) (85 – 90 % efficiency) AL29-4C double wall Negative Positive

16 Sub Title Fan Assisted (85+ efficiency) IV III II I Atmospheric Forced Draft Condensing Masonry Chimney Liners Clay tile liner Fan Assisted Clay tile liner (interior chimney) Steel liner (exterior chimney) Exception: Clay tile liner can be used with exterior chimney if an Atmospheric appliance is connected to the same chimney AL29-4C Liner Positive pressure steel liner Ex. Welded steel, Inner liner of pressure stack AL29-4C Liner Reference: ANSI Z and , NFPA Negative Positive

17 Sub Title Z (Venting of equipment) Minimum Safe Performance A venting system shall be designed and constructed so as to develop a positive flow adequate to remove flue or vent gases to the outside atmosphere Equipment Draft Requirement A venting system shall satisfy the draft requirement of the equipment in accordance with the manufacturers instructions.

18 Sub Title Chimney Design Equation 1996 Edition INPUTS: Appliance Type Fuel Type MBH Input CO 2 % in Flue Gases Flue Gas Temperature Ambient Temperature Altitude Flue Layout RESULTS: Flue Gas Volume Flue Gas Velocity Theoretical Draft Total Pressure Losses Appliance Outlet Pressure Outlet Pressure Losses (+) + Theoretical Draft (-)

19 Sub Title Boiler Efficiency versus Draft

20 Sub Title Annual Draft Variations

21 Sub Title Chimney Draft – Steady-State

22 Sub Title Draft Variations During Operation Vent = 30 vert./10 horiz., 18 diam. 4 Fan-assisted Cat I boilers with 1,000 MBH input each Constant ambient of 60°F Draft requirement: 0.05WC

23 Sub Title Modulating Boiler Systems Gravity Stack Design

24 Sub Title Chimney Automation Systems

25 Sub Title CASV – Chimney Automation System

26 Sub Title CASI – Chimney Automation System

27 Sub Title Modulating Boiler Systems Controlled Draft Design

28 Sub Title First Cost Analysis Ordinary Stack Material Cost EXHAUSTO System Material Cost ItemQtyList Price ItemQtyList Price 20" pressure stack35' $ 5,775 12" pressure stack50' $ 4,600 16" pressure stack5' $ " Tee1 $ " pressure stack5' $ " end cap2 $ " pressure stack5' $ " x 8" reducing Tee4 $ 1,240 20" Tee1 $ " end cap1 $ " x 8" reducing Tee1 $ " x 16" tapered reducer1 $ " x 8" reducing Tee1 $ " x 14" tapered reducer1 $ " x 8" reducing Tee1 $ " x 10" tapered reducer1 $ " x 8" reducing Tee1 $ " end cap1 $ " stack cap1 $ 640 Total $ 11,210 Total $ 6,445

29 Sub Title National Fuel Gas Code NFPA 54 IFGC ANSI Z Horizontal distances Large stack area Self venting connector rise Fan Min capacities Different type of appliances Existing masonry chimneys Location of draft inducer

30 Sub Title Common Code Violations (NFPA 54) Z (Venting of Equipment) The total horizontal distance of a vent plus the horizontal vent connector serving draft hood-equipped appliances shall not be greater than 75 % of the vertical height of the vent. Table 13.1 and 13.2 The total horizontal length of the vent plus the vent connector for a single Category I appliance is: 100% of the height (vent 6 – 30 ft high); 30 ft (vent 31 – 50 ft high); 50% of the height (vent 51 – 100 ft high) Chimney Automation System

31 Sub Title Common Code Violations (NFPA 54) Z (Sizing of Venting Systems) The maximum vent connector horizontal length shall be 18 in./in of connector diameter The length of the common vent manifold shall not exceed 18 in./in. of common vent diameter The horizontal length of the common vent offset shall not exceed 18 in./in. of common vent diameter. Chimney Automation System

32 Sub Title Common Code Violations (NFPA 54) Z223 Sizing Tables Chimney Automation System

33 Sub Title Common Code Violations (NFPA 54) Z (Sizing of Venting Systems) Where two or more appliances are connected to a vertical vent or chimney, the flow area of the largest section of vertical or chimney shall not exceed seven times the smallest listed appliance categorized vent areas, flue collar area, or draft hood outlet area unless designed in accordance with approved engineering methods. Chimney Automation System

34 Sub Title Common Code Violations (NFPA 54) Z (Venting of Equipment) Vent connectors serving Category I appliances shall not be connected into any portion of mechanical draft systems operating under positive static pressure, such as those serving Category III or Category IV appliances. Chimney Automation System

35 Sub Title Common Code Violations (NFPA 54) Z Masonry chimneys shall be built and installed in accordance with NFPA 211. (NFPA 211) Masonry chimneys shall be lined….Cat II, III and IV gas appliances - special gas vents listed for installation within masonry chimneys. Chimney Automation System

36 Sub Title Common Code Violations (NFPA 54) Z (Mechanical Draft Systems) Forced draft systems and all portions of induced draft systems under positive pressure during operation shall be designed and installed so as to prevent leakage of flue or vent gases into a building Vent connectors serving equipment vented by natural draft shall not be connected into any portion of mechanical draft systems operating under positive pressure. + -

37 Sub Title Side-wall Venting Z (Venting of Equipment) Mechanical Draft Systems. The exit terminals of mechanical draft systems shall be not less than 7ft above grade where located adjacent to public walkways.

38 Sub Title Side-wall Venting Z (Venting of Equipment) 7.8 Venting System Location. (a) A Venting system shall terminate at least 3 ft (0.9 m) above any forced air inlet located within 10 ft (3.1 m). Exception No. 1: This provision shall not apply to the combustion air intake of a direct-vent appliance. Exception No. 2: This provision shall not apply to the separation of circulating air inlet and flue gas discharge of listed outdoor appliances.

39 Sub Title Side-wall Venting Z (Venting of Equipment) 7.8 Venting System Location. (b) The venting system of other than a direct-vent appliance shall terminate at least 4 ft (1.2 m) below, 4 ft (1.2 m) horizontally from, or 1 ft (30 cm) above any door, window, or gravity air inlet into any building. The bottom of the vent terminal shall be located at least 12 in. (30 cm) above grade.

40 Sub Title Roof-top Venting Z (Venting of Equipment)

41 Sub Title Gravity Stack Terminations NFPA Fig. 12aNFPA Fig. 12b

42 Sub Title Gravity Stack Terminations Experience Shows

43 Sub Title Mechanical Draft Systems Defined Mechanical draft systems shall be listed and shall be installed in accordance with the terms of their listing and both the appliance and the mechanical draft system manufacturers instructions Gas utilization equipment requiring venting shall be permitted to be vented by means of mechanical draft systems of either forced or induced draft design. Exception: Incinerators Where a mechanical draft system is employed, provision shall be made to prevent flow of gas to the main burners when the draft system is not performing so as to satisfy the operating requirements of the equipment for safe performance Z Standard for Venting of Equipment

44 Sub Title Mechanical Draft Systems Defined Mechanical draft. Chimney venting systems using mechanical draft shall be sized in accordance with approved engineering methods Size of Chimneys. Chimney venting systems using mechanical draft shall be sized in accordance with approved engineering methods. IFGC - Section 503 (Venting of Equipment) Z Standard for Venting of Equipment

45 Sub Title Why Chimney Automation? Reduce Heating Cost Reduce Emissions Enhance Draft for Efficient Boiler Operation Clean Up Aesthetic s Improve Safety

46 Sub Title CASV – Chimney Automation System

47 Sub Title RSV – Chimney Fan 3/16 Cast aluminum housing Hinged for easy service and cleaning Direct drive Class H insulated motor - eliminates the need for secondary fan cooling Maintenance free 575 ºF Continuous Duty UL 378 – Draft Equipment The RSV fan can vent all appliance categories with or without barometric dampers Simple design with few components reduces the risk of failure and simplifies service RSV is of Type B, Spark Resistant Construction

48 Sub Title RSV – Chimney Fan Cast aluminum impeller wheel CFM Permanently attached balance weights Cooling vane mounted on the back of the impeller RSV are single phase 120 V AC RSV are three phase 208 or 400 V AC

49 Sub Title Fan – Motor Characteristics Source: NEMA

50 Sub Title CASI – Chimney Automation System

51 Sub Title RSIB – Power Venter SS16 construction Removable access door Direct drive Class A insulated motor - eliminates the need for secondary fan cooling Maintenance free 575 ºF Continuous Duty UL 378 – Draft Equipment The RSIB fan can vent category I, II, III and IV appliances with or without barometric dampers Simple design with few components reduces the risk of failure and simplifies service RSIB is of Type B, Spark Resistant Construction

52 Sub Title Installation Options - RSIB

53 Sub Title EBC 30 Control - Functions Quick reaction to changes in draft conditions Plug-n-Play Priority function Bearings cycle Rotation check Handles two 0-10VDC outputs and one 0-120VAC output Interlock with up 10 appliances Numerous programmable features 80% software and 20% hardware guarantees future improvements without replacing control

54 Sub Title EBC 30 Control - Design Main BoardDisplay and processor Relay Module (optional) Fan Control Module (optional)

55 Sub Title EBC 30 – Control Characteristics EBC 30 Other Controls Quick reaction to changes in draft conditions (max. 20 seconds) Low draft cut-off Slow reaction to changes in draft conditions (up to 90 seconds) Low draft cut-off High draft cut-off

56 Sub Title RSIF – Power Venter

57 Sub Title New RSIF Power Venter Rated to 400°F non-condensing applications Forward inclined impeller. Statically and dynamically balanced. Insulated housing in galvanized steel Hinged fan housing easily opens to provide easy access to duct and impeller Direct drive, variable speed, TEFC motor located outside housing for easy access. Three Models 440, 740, & 1000 cfm

58 Sub Title New Products – EBC 5 Features Controls RSV , all RSIF Fans, and BESB250 Activates on a V AC or DC signal Built-in Fan Speed Control Time delay and active response to avoid nuisance alarms Pre and Post – Purge cycle No built-in PDS

59 Sub Title CASV Applications – Stack Downsizing Hazen High School – Renton, WA Soldier Field - Chicago, IL

60 Sub Title CASV Applications - Aesthetics Getty Center – Los Angeles, CA Rigel – South San Francisco, CA

61 Sub Title CASV Applications - Aesthetics SBC Center – San Antonio, TX

62 Sub Title CASV Applications

63 MODS Modulating Overdraft Damper System

64 Sub Title Modulating Overdraft Damper System

65 Sub Title MODS Components MDF Damper Sizes – 12 in. to 48 in. diameters Multiple opposed blades made of 16 gauge type 316 stainless Pressure stack flange connections Rated to 700°F EBC30 Prime function Additional over-pressure protection for Forced-draft boilers

66 Sub Title MODS Applications Kaiser Center - Oakland, CA Wells Fargo - Great Falls, MT Markham Road - Toronto

67 MCAS Mechanical Combustion Air Supply

68 Sub Title Code Requirements – Air for Combustion and Ventilation Two Permanent Openings Method. Two permanent openings, one commencing within 12 in. of the top and one commencing within 12 in. of the bottom of the enclosure, shall be provided. The openings shall communicate directly, or by ducts, with the outdoors or spaces that freely communicate with the outdoors as follows: (1)Where directly communicating with the outdoors or through vertical ducts, each opening shall have a minimum free area of 1 in.²/4000 Btu of total input rating of all equipment in the enclosure. (2)Where communicating with the outdoors through horizontal ducts, each opening shall have a minimum free area of not less than 1in.²/2000 Btu of total input rating of all equipment in the enclosure Codes and Standards Z Outdoor Combustion Air.

69 Sub Title Code Requirements – Air for Combustion and Ventilation One Permanent Opening Method: One permanent opening, commencing within 12 in. of the top of the enclosure, shall be provided. The opening shall directly communicate with the outdoors or shall communicate through a vertical or horizontal duct to the outdoors or spaces that freely communicate with the outdoors and shall have a minimum free area of the following: (1)1 in.²/3000 Btu of the total input rating of all equipment located in the enclosure, and (2) Not less than the sum of the areas of all vent connectors in the space. Codes and Standards Z Outdoor Combustion Air.

70 Sub Title 2000 MBH Louver(s) Sizing: 1 sq.in./4000 Btu per louver 4000 MBH = 1000 in 2 of free area per louver. Typical louver has 30-60% free area. Depending on louver design actual louver size will be: Using 45% free area louvers = Two 5 x 4 louvers Sizing of Gravity Louvers Codes and Standards

71 Sub Title Code Requirements – Air for Combustion and Ventilation – Mechanical Combustion Air Supply (MCAS) Mechanical Combustion Air Supply. Where all combustion air is provided by a mechanical air supply system, the combustion air shall be supplied from outdoors at the minimum rate of 0.35 ft³/min per 1000 Btu/hr for all appliances located within the space Where exhaust fans are installed, additional air shall be provided to replace the exhausted air Each of the appliances served shall be interlocked to the mechanical air supply system to prevent main burner operation where the mechanical air supply system is not in operation. Codes and Standards Z

72 Sub Title 2000 MBH Louver Sizing: Engineered using ASHRAE Chimney Design Equation. Flue Gas Volume corrected for temperature = 1,400 cfm of combustion air 1400 cfm/500 fpm = 2.8 ft 2 of louver free area Using a 45% free area louver = One 3 x 2 louver Sizing of Mechanical Combustion Air Codes and Standards

73 MCAS Mechanical Combustion Air Supply

74 Sub Title MCAS – Modulating Combustion Air Supply System

75 Sub Title MCAS Components – BESF/BESB Fan Fan can be mounted indoors or outdoors. Impeller - statically and dynamically balanced. Insulated housing in galvanized steel Hinged fan housing easily opens to provide easy access to duct and impeller Direct drive, variable speed, TEFC motor located outside housing for easy access. Variable Frequency Drive is used on three phase models (VFD should be located inside the building). Seven Models 450 – 5500 cfm

76 Sub Title MCAS Components – SFTA Fan Fan can be mounted indoors Impeller – cast allunimum. Housing in steel Direct drive, variable speed, TEFC motor located outside housing for easy access. Variable Frequency Drive is used on three phase models (VFD should be located inside the building). Seven Models 1,500 – 30,000 cfm

77 Sub Title EBC30 Modulating Control Chimney Automation System Modulating Combustion Air Supply System

78 MCAS Mechanical Combustion Air Supply

79 Sub Title SBC Center – San Antonio, TX Two 16 inch ducted combustion air inlets Instead of Two 10 foot high by 15 foot long Louvers

80 Sub Title Lifetime Fitness – Savage, MN

81 Sub Title Marriott Waterfront – Annapolis, MD One 24 inch ducted combustion air Instead of one 90 ft.² louver

82 MDVS Modulating Dryer Venting System

83 Sub Title Why a MDVS? To extend the exhaust duct length of a single or multiple dryers To common exhaust multiple dryers To meet codes especially fire ratings To reduce drying times To reduce energy costs

84 Sub Title Types of Clothes Dryers Type 1 dryers: Domestic dryers to be used primarily in a family living environment. Residences Individual apartments or condominiums Type 2 dryers: Public dryers designed to be used in business with direct intercourse of the function with the public. Laundromats Laundry rooms (apartment complexes, dormitories, etc.) Business laundries (hotels, hospitals, health clubs, etc.)

85 Sub Title Typical Dryer Manufacturers Requirements Where possible use a single exhaust duct per dryer Dryers are to run with a positive outlet pressure. Type 1 dryers between and inch W.C. Type 2 dryers between and inch W.C. Maximum exhaust duct length: Type 1 dryers = 35 equiv. feet (each elbow = 5 feet) Type 2 dryers = 15 equiv. feet (each elbow = 5 feet)

86 Sub Title Typical Dryer Manufacturers Requirements for Multiple Dryers Vertical venting must not exceed 8 feet and can include up to 3 elbows Horizontal venting cannot exceed 15 feet and 1 elbow.

87 Sub Title Use an MDVS to Extend Exhaust Duct Exhaust duct can be extended to almost any length No need to locate dryer near a secluded outdoor wall Reduce drying times by holding the correct outlet pressure

88 Sub Title Common Exhausting of Multiple Dryers Common horizontal duct diameter is sized with maximum 0.10 inch W.C. pressure drop Pressure drop in main exhaust shaft is only limited by fans total pressure capability Cleanouts must be provided in the common horizontal as well as the main exhaust shaft for removal of lint The BESB fan can be located anywhere down- stream of the last dryer

89 Sub Title Common Exhausting of Multiple Dryers By definition only Type 2 dryers should be used for this application Connector from dryer outlet to common horizontal is metal duct with smooth interior finish Connector diameter = dryer outlet diameter Max connector length = 15 equivalent feet Connector to be attached to common horizontal at no greater than 45°

90 Sub Title Use an MDVS for Multiple Dryer Exhausting Multistory exhausting of dryers Common exhausting of multiple dryers

91 Sub Title Multistory Exhausting of Dryers Type 1 or Type 2 dryers If main exhaust shaft does not need to be fire rated – attach connector to main shaft at 45° as previously shown If main exhaust shaft does need to be fire rated – attach connector via a 22 inch subduct riser as shown Main exhaust shaft and subduct riser must be made of appropriate materials to meet local codes In order to offset the subducts, a square or rectangular main exhaust shaft should be considered

92 Sub Title Main Issues when Common Exhausting Dryers For multistory dryer systems where the 22 inch subduct is used to maintain fire rating, a fan MUST BE USED and it must be in operation at all times to comply with code requirements IBC Penetrations of shaft enclosures. Shaft enclosures that are permitted to be penetrated by ducts and air transfer openings shall be protected with approved fire and smoke dampers installed in accordance with their listing. Exceptions: 1. Fire dampers are not required at penetrations of shafts where: 1.1 Steel exhaust subducts extend at least 22 inches (559 mm) vertically in exhaust shafts pro-vided there is a continuous airflow upward to the outside. 2. In Group B and R occupancies, equipped throughout with and automatic sprinkler system in accordance with Section smoke dampers are not required at penetrations of shafts where: 2.1. Kitchen, clothes dryer, bathroom and toilet room exhaust are installed with steel exhaust subducts, having a wall thickness of 0.019(0.48 mm); and 2.2 That extend at least 22 inches vertically; and 2.3 An exhaust fan is installed at the upper terminus of the shaft, that is powered continuously in accordance with Section , so as to maintain a continuous upward airflow to the outside.

93 Sub Title Multistory Exhausting of Dryers Dryer is connected to subduct riser using a transition duct Type 1 dryers - total equivalent feet of subduct riser plus transition duct = 25 feet Type 1 dryers can use an approved flexible metal duct of max 8 feet Type 2 dryers – total equivalent feet of subduct riser plus transition duct = 15 feet

94 Sub Title Multistory Exhausting of Dryers Main exhaust shaft is made of smooth (fire- rated) material Main exhaust shaft sized to max 0.10 inch W.C. pressure drop Access door or cleanout to be located at bottom of main exhaust shaft for lint removal BESB fan can be located anywhere above top most dryer

95 Sub Title Main Issues when Common Exhausting Dryers No dampers (back-draft dampers, fire dampers) or baffles can be used IN the duct system unless approved by the dryer manufacturer. An approved back-draft damper can be used at the termination of the exhaust duct. Exhaust system must be able to unload so that off dryers will not be drawn into a deep negative The pressure drop between dryers must be maintained less than 0.10 in W.C.

96 Sub Title MDVS versus Single Speed MDVS ETL Listed mechanical dryer exhaust system Usually runs at low rpm = low power Uses little to no conditioned air = low additional building heat or A/C Single Speed No listing for lint-laden air Runs at full rpm 24 hr/day X 365 days/yr = high power Uses a large quantity of conditioned air = large additional building heat and A/C

97 Sub Title Recommended Diversity Factors Application Number of Dryers per Exhaust Shaft Diversity Factor Common Exhausting % % 15 - up80 % Multistory Exhausting (One dryer per apartment) % % % % 20 - up50 %

98 Sub Title MDVS versus Single Speed 20 Dryer Multistory Apartment 200 cfm X 20 X 50% = 2000 cfm MDVSSingle SpeedSavings Fan Power41 KW/yr$4 /yr4368 KW/yr$437 /yr$434 /yr Loss of heated air 1,454,200 (BTU/yr) $15 /yr 155,520,000 (BTU/yr) $1,555 /yr$1540 /yr Loss of A/C air (sensible only) 824,100 (BTU/yr) $5 /yr 88,128,000 (BTU/yr) $557 /yr$552 /yr Location = Atlanta, GA (3000 DD H, 1700 DD C ) Power = $0.10 per KW/h Heating = $1.00 per therm A/C =.75 KW/ton X $0.10 per KW/h Total Annual Savings = $2526

99 Sub Title MDVS – Mechanical Dryer Venting System

100 Sub Title MDVS Components - BESB Fan Cast aluminum, backward curved impeller reduces lint build-up. Statically and dynamically balanced with permanently attached balancing weights. Insulated hinged fan housing easily opens to provide easy access to duct and impeller Direct drive with variable speed TEFC motor located outside housing for easy access. Frequency drive should be located inside the building. ETL Listed to UL705 with special consideration for operation with lint-laden air Four Models 1200 – 5500 cfm

101 Sub Title Mechanical Dryer Venting Systems

102 Sub Title ABCs of the MDVS A Aesthetics Exhaust your dryers out a less visible wall Locate dryers where you want B Back Pressure Maintain the back pressure required by the manufacture to keep drying time down and reduce the risk of fires C Cost reduction Reduce the size of the exhaust vent Reduce operating costs by keeping drying times down

103 MCAS Modulating Combustion Air Supply for Dryers

104 Sub Title Make-Up Air. Z Clothes Dryers Provisions for Make-Up Air. Provisions for make-up air shall be provided for Type 2 clothes dryers, with a minimum free area of 1 sq.in. for each 1000 Btu per hr total input rating of the dryer(s) installed. Why MCAS for Dryers?

105 Sub Title Manufacturers Requirement National Fuel Gas Code requires a minimum free area opening of 1 sq.in./1000 Btuh Most manufacturers require even larger – approximately 1 sq.in / 700 Btuh. Ex. A twin 30# tumbler dryer with a total input of 204,000 Btuh (1100 cfm) requires a minimum 2 sq.ft. free area opening. Most laundry facilities have problems with make-up air. The industry believes it is one of their biggest problems.

106 Sub Title MCAS Components – SFTA Fan Fan can be mounted indoors Impeller – cast allunimum. Housing in steel Direct drive, variable speed, TEFC motor located outside housing for easy access. Variable Frequency Drive is used on three phase models (VFD should be located inside the building). Seven Models 1,500 – 30,000 cfm

107 Sub Title Marriott Waterfront – Annapolis, MD One 24 inch ducted combustion air inlet Instead of One 90 ft.² louver

108 Simulators CASV / MCAS MDVS

109 Sub Title


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