Presentation on theme: "PTCS Aeroseal Specification Approval Measure Proposal Presentation to the Regional Technical Forum June 28, 2011."— Presentation transcript:
PTCS Aeroseal Specification Approval Measure Proposal Presentation to the Regional Technical Forum June 28, 2011
Measure Summary PTCS Duct Sealing & Heat Pump UES Measure Requesting Measure Status Change: No Change in measure savings: No Change in measure cost effectiveness: No Follow-up for RTF: Technical Specification Maintenance
Measure History Previously approved: Specifications Administered by RTF Since 03/2003 Measure Developer(s): RTF and subcommittee PTCS not current with Guidelines – Workbooks: Complete – Summary sheet: Need one – Documentation: Adequate – Measure cost and life documentation: Complete – Data and evaluation sources: Needs evaluation
Subcommittee Summary Subcommittee meetings: 5/26/2011 Subcommittee members: Adam Hadley, Zach Erdmann, Mark Jerome, Jim Haberman, Todd Blackman, Darroll Clark, Neal Walsh, Mark Johnson, Mark Kendall, Andres Morrison, Brady Peeks
Aeroseal History With PTCS – Aeroseal previously has been recognized by RTF as delivering a valid duct total leakage @ 25 Pa test. – Aeroseal presented to the PTCS subcommittee a test protocol that utilizes a blower door with a digital manometer to work in conjunction with the Aeroseal machine. – Protocol will utilize a routine in the Aeroseal software to deliver a duct leakage to outside measurement at any desired test pressure
Pre-Sealing Leakage Test Turn off the HVAC unit to be tested. Set-up the Blower Door testing system. Open any mechanical dampers after marking their existing position. Use DuctMask to temporarily seal all registers and return grilles prior to their removal. This allows measurement of all leakage at the register-boot/sheet-rock junctions and the HVAC equipment. Seal any intentional outdoor air intakes. Insert the blue pressure tube assembly into supply and return sides of the duct system through register plugs or other convenient opening. Place the equal-length tubes in both the supply and return to provide an average of the two pressures. This improves the accuracy of the test, particularly when there is significant resistance between the supply and return sides (e.g. a dirty or blocked coil). If the Aeroseal machine is inside the pressurized building envelope, insert the clear pressure tube into the brass barb directly across from the blue barb and place the tube through a convenient opening in the building envelope to measure outside air pressure. If the Aeroseal machine is outside the building envelope, the reference pressure measured at the brass bar on the computer case will read the outside air pressure. Start the Blower Door machine. Start the Aeroseal machine. When prompted by the software, set the Inlet Gate Setting to #2. Ensure the injector gate is set to the same setting. Press ‘T’ on the Aeroseal pre-seal screen and adjust the target pressure for the pre-seal test to 50 Pa. Press F2 to begin the Duct Leakage to Outside test. The fan will gradually ramp up to, and then hold, a duct/mechanical-system pressure of 50 Pa. Adjust the Blower Door machine fan speed to maintain a building pressure of 50 Pa during the test. After the Pre-Seal test is complete, remove all temporary DuctMask seals and replace with foam blocks.
During the test, the duct leakage on the Aeroseal machine is displayed in CFM @ 50 Pa, and in square inches of equivalent hole size. With the duct pressure held constant at 0.20 inch H2O (50 Pa), the software measures the airflow thru the fan box. As all purposeful duct openings have been temporarily blocked and the building has been pressurized to the same pressure as the duct system, the measured airflow through the fan box is the leakage of the duct system to the outside at an average pressure of 0.20 inch H2O (50 Pa).
PTCS Changes – AeroSeal technician would be required to obtain PTCS duct sealing certification. All PTCS duct sealing requirements apply (e.g., assuring mechanical connections, etc.). – Only changes would be the equipment used by the technician to test leakage and the method by which duct sealant is applied
Sub Committee Recommendation: Accept Aeroseal equipment with blower door and duct leakage to outside test protocol as a PTCS-allowed method for measuring duct leakage to outside at 50 PA - Consensus
Decision Impact Specifications: No change necessary Savings: No impact Life: No impact Measure cost: No impact Cost to certify measure: No impact Practitioner qualifications: No change, PTCS certification required Evaluations requirements: No impact
RTF Proposed Motion: “I _________ move that the RTF approve the use of the Aeroseal machine in combination with a blower door to measure duct leakage to outside at 50 Pa, using the test protocol developed by Aeroseal and incorporated into the Aeroseal software system.”
PTCS Heat Pump Warrantee Specification Change Approval Measure Proposal Presentation to the Regional Technical Forum June 28, 2011
Changes to PTCS Remove From Specification: Heat pump equipment shall be warranted by the manufacturer against defects in material and workmanship for a minimum of 5 years from the date of start-up of the equipment. In addition, the compressor shall be warranted by the manufacturer against defects in material and workmanship for a minimum of five years from the date of startup. Warranties shall cover parts and labor. Participating Installers may offer to consumers the manufacturer’s extended warranty or service agreement to comply with the warranty requirements. This warranty should not be considered to cover equipment failure caused by failure to perform normal maintenance, abuse, or external causes beyond the control of the installing Participating Installer. Replace with: 3.3 New System Warranty The participating Installer shall provide to the consumer in writing the manufacturer’s warranty.
Sub Committee Recommendation Accept edits to PTCS heat pump specifications to allow manufacturer warranty terms on heat pump equipment. - Consensus
Decision Impact Specifications: No change necessary Savings: No impact Life: No impact Measure cost: Possible reduction. Consumer is not required to purchase extended warranty Cost to certify measure: No impact Practitioner qualifications: No change, PTCS certification required Evaluations requirements: No impact
RTF Proposed Motion: “I _________ move that the RTF approve amending the PTCS heat pump specifications section 3.3, New System Warranty, to eliminate requiring specific warranty periods, thus reading as follows: 3.3 New System Warranty The participating Installer shall provide to the consumer in writing the manufacturer’s Warranty.”