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Residential Weatherization and Ventilation Subcommittee

Residential Weatherization and Ventilation Subcommittee. Presentation to the Regional Technical Forum November 1, 2011. Specifications Approved August 30

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Residential Weatherization and Ventilation Subcommittee

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  1. Residential Weatherization and Ventilation Subcommittee Presentation to the Regional Technical Forum November 1, 2011

  2. Specifications Approved August 30 “that the RTF adopt the Residential Weatherization Specifications developed by the Residential Weatherization Specification Subcommittee dated August 31, with a sunset three years hence.”... amendment that implementation is pending development of a test for the inspections. Subcommittee charged with two tasks: Today: Develop test & present to RTF for approval (as to form or actual content) Next: Develop evaluation plan for sample of homes receiving air sealing in conjunction with measure install Update Subcommittee: Residential Weatherization and Ventilation Specifications

  3. Two subcomm meetings • Review periods and input solicited • Met with BPA auditor legacy instructors (Manclark, Ebbage) • Developed 150 general questions • Developed 20 ventilation-specific questions Developing the test Subcommittee: Residential Weatherization and Ventilation Specifications

  4. Testing Procedures and Requirements • Program administrators using the RTF Residential Weatherization Specification must evidence that inspectors verifying the weatherization sample under their administration have passed the test • The test is delivered in a total of 70 questions (50 Weatherization 20 Ventilation) • 150 questions cover all weatherization categories of the specifications • Weatherization questions are provided in 3 banks of 50 questions each • Tests on weatherization specifications are conducted by randomly selecting one of the three banks of 50 questions per inspector test • All 20 of the Ventilation questions are required to be administered in each test Subcommittee: Residential Weatherization and Ventilation Specifications

  5. Testing Procedures and Requirements • The test is taken on-line to record pass/fail and to collect the registry information from the inspector (name, contact information, experience survey data, employer) • The test is open book • 80% of the questions must be answered correctly in each section (40 correct in Weatherization, 16 in Ventilation) to pass • Each test taken, answers and contact information, are retained in data storage for verification • The test may be taken twice within one year Subcommittee: Residential Weatherization and Ventilation Specifications

  6. Question Format & Examples • Three sets of 50 questions provide a minimum of three different tests • Is Whole House Mechanical Ventilation Compliance required when Whole House Air Sealing is performed? • Is Whole House Mechanical Ventilation Compliance required when prescriptive air sealing is performed as a part of attic insulation? • Is Whole House Mechanical Ventilation Compliance required when prescriptive air sealing is performed as a part of floor insulation? Subcommittee: Residential Weatherization and Ventilation Specifications

  7. Question Format & Examples • 20 Ventilation questions, including a “story problem” that requires the use of the EZVent Calculator • Use the Whole House Ventilation Calculator to determine the required whole house fan measured flow rate for a house with the following characteristics: • 2500 sqft • 15 feet vertical distance from lowest grade level to highest • 3 bedroom • 2 bathroom • 4 occupants • Blower door test at 1200 CFM50 • Boise, ID • 24-hour whole house fan on-time per cycle • Kitchen and bath fans vented to outside, operable, and meet duct specs • Kitchen fan rated flow rate of 100 CFM • Bathroom 1 tested flow rate: 25 CFM • Bathroom tested flow rate: 50 CFM Subcommittee: Residential Weatherization and Ventilation Specifications

  8. Question Format & Examples • All exhaust fans shall be vented to the ________ of the structure • Exhaust ducts in unconditioned space shall be insulated to a minimum of ______ • Is vinyl coil allowed for use with spot ventilation exhaust fans? • Do non-recirculation kitchen exhaust fans need to be vented to the exterior of the structure? • Can kitchen exhaust fans be vented using metal coil duct? • What is an acceptable material for use for kitchen fan terminations? • Dryer exhaust ducts shall terminate in a _______________________. • New dryer ducts shall be made of ________ • New dryer vent ducts shall not be connected with _________. • Exhaust systems capable of exhausting in excess of _______ CFM shall be provided with makeup air Subcommittee: Residential Weatherization and Ventilation Specifications

  9. Question Format & Examples • Use the Exhaust Fan Prescriptive Duct Sizing chart to determine the maximum duct length for smooth 4" hard duct used with a fan with 80 CFM rating. • Are whole-house mechanical ventilation air flow rates confirmed by testing by the contractor or by the rated air flow of the fan? • Exhaust fans installed for whole house mechanical ventilation purposes shall be ____________ compliant. • Exhaust fans installed for whole house mechanical ventilation purposes shall have a sone level of ________ or less • What is the minimum clearance under the bathroom door to provide a clear air pathway when bathroom fans are used as whole-house fans? • Bathroom fans used as whole-house fans shall have both _________and__________ controls • Can whole-house fans be set to run intermittently on a timer? • If installed, heat recovery ventilation shall be certified and listed in the _____________________________________ directory. Subcommittee: Residential Weatherization and Ventilation Specifications

  10. Test Administration • Note: The test is about the specifications, not building science or how to audit. It is not a replacement for auditor or inspector training and is not a certification. • Posted Specifications and Q&A • Webinar of Specification Changes (real time and recorded) • Challenge option for experienced utility representatives • Online quiz format with feedback • Registry of representatives who pass the test • Presentations at utility roundtables • Gauge interest in renewing more technical training for utility representatives Subcommittee: Residential Weatherization and Ventilation Specifications

  11. Test Administration • Next Steps • Establish budget for administration and responsibility • Select vendor: e.g. Lane Community College has BPA auditor test • Schedule information roll out Subcommittee: Residential Weatherization and Ventilation Specifications

  12. Evaluation of Air Sealing Practices • Utility interviews to gather capabilities in field, identify opportunities to lever existing utility audit procedures • Develop sample: method, location, duration • Develop budget for data collection • Deliver evaluation plan to RTF for review and approval Subcommittee: Residential Weatherization and Ventilation Specifications

  13. RTF Proposed Motion: “I ____________move that the RTF adopt the Residential Weatherization Specifications Inspectors Examination developed by the Residential Weatherization Specification Subcommittee”

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