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Multifamily Air Sealing Program

The Multifamily Air Sealing Program, led by Bobbi Wilhelm and John Forde, aims to enhance energy efficiency in multi-unit buildings through air sealing measures. Initiated in January 2012, the program targets electrically heated buildings, with an estimated potential of 200,000 units served. Key measures include attic sealing, insulation, and ventilation improvements. The team utilizes comprehensive audits, blower door testing, and a range of evaluation methods to assess program effectiveness and optimize results. Completion is projected by December 2013.

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Multifamily Air Sealing Program

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  1. Multifamily Air Sealing Program Bobbi Wilhelm/John Forde Implementation & Evaluation protocols March 20, 2013

  2. Team Introductions • Puget Sound Energy: • Bobbi Wilhelm: Evaluation • John Forde: Market Manager • Clint Stewart: Program Manager • Arrow Insulation: • Ben Burton: Sr. Program Manager • Dave Burton: Program Manager • Jay Dupree: Field Rep • DNV KEMA: • Jarred Metoyer & Team • More help & support is located on the Microsoft website:http://office.microsoft.com/en-us/powerpoint-help/CL010072915.aspx?CTT=97

  3. Agenda • Overview of the Air Sealing Program • Buildings Served • Air Sealing Video • Program Implementation Protocols • Video of Air Sealing Project • Program Evaluation Protocols/Strategy

  4. Why Multifamily Air Sealing • I-937 • PSE continues to seek new energy savings opportunities in all sectors, including multifamily • Based on the number of electrically heated multifamily buildings/units in the PSE service area, there is significant energy savings opportunity. The estimated potential is 200,000 units • During the 2012-13 RFP process, Arrow Insulation Inc. submitted a Multifamily Air Sealing Proposal

  5. Program Overview • Measures Include: • Attic air sealing and insulation • Dense pack walls/rim joists • Floor air sealing and insulation • Door gaskets and sweeps • Ventilation fan timers • Air sealing only measures if already insulated or combined air sealing and insulation • On site audit to gather building information • Utilizes whole building blower door testing (pre-post) • Program Implementation team conducts post installation TREAT modeling.

  6. Program Overview Continued • Program started January, 2012 and will be completed by December 2013 • Building types range from 6 units single story to 20 units with 3 stories and located in most of the service area counties • Recruitment through past weatherization participants, program marketing efforts, etc. • Owners must commit to no additional energy efficient upgrades for 1 year (including heating season)

  7. Units Served to Date • Previously Insulated Buildings(no additional insulation): • 18 Buildings • 133 Units • 71,328 sq ft attic & floor • 63,772 sq ft walls • Non-previously Insulated: • 15 Buildings • 142 Units • 91,357 sq ft Attic & Floor • 58,027 sq ft Walls

  8. Protocols • Comprehensive TREAT audit performed • Measures include: • Attic air sealing and insulation • Dense pack walls/rim joists • Floor air sealing and insulation • Door gaskets and sweeps • Ventilation fan timers • Inform property owner/set dates for install • Whole building depressurization performed before and after each installed measures

  9. Current Infiltration Reduction

  10. Current Infiltration Reduction

  11. Photos

  12. Video View Youtube Video

  13. Program Implementation & Evaluation • The MF Air Sealing Team invited me (evaluation) in the room early • The team taught me what air sealing was (thanks!) • The team asked for input on what needs to be done so that we can evaluate the program • I suggested: • Testing out after every measure and randomizing measure installation • Help assist with program optimization in event of lower avoided costs • Get a consultant on board who deals with complicated engineering & MF evaluations to take a look

  14. As of April 2012 • Team began testing in and out between measures and randomizing measure installation patterns • We sent out an RFP and hired KEMA to assist with a ‘process’ type evaluation • Provide us with an overview of evaluation methods given our implementation strategy • Give us a ‘best in class’ recommendation for evaluation of the program • Provide us with a gap analysis on data needs

  15. Evaluation Methods • Billing analysis • Relatively complex algorithm that • is accurate for program and site level, • difficult to identify control • difficult for regression to address non‐linear effects of occupancy and measures • Prototype Simulation with Billing History • Affordable • accurate for population • not accurate at the site level • difficulty with understanding the ‘prototype’ • Individual building models –use bill history for calibration • Higher cost • Most Accurate results

  16. Current Program Status • Test in and out of every building • Multiple blower doors – Whole building approach • Test out between every measure • Provides an understanding of how measures stack up • Collecting insulation values pre & post • Collecting up to 10 years of billing history data for every building • Average Heating Set point (thermostat) is gathered • Building, window, etc. square footage • Currently collecting lighting wattages • Collecting major appliances – letting treat default on annual kWh

  17. Next Steps • True up modeling with billing history • Implement process improvements • Air seal final buildngs • Complete Evaluation • Present findings to RTF

  18. Thanks! Questions/Comments?

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