Austin Energy HPwES Evaluation Report 2012
Task 4: Identify Lessons Learned and Best Practices from Austin Energy’s HPwES Program
5.2 Operation and Delivery
5.2.3 Contractor Network
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Table 5‐2: Summary of Various HPwES Program HVAC Analysis Requirements HPwES Program HVAC Analysis Note
APS Manual J Performs Manual J tests as part of quality assurance. Do not performance Manual D Tests.
Home Free Nevada NV Test
A Manual J is not performed. Instead, uses a tool within its Optimizer software that performs a test that is similar to the Manual J. When the results of the Manual J are compared with Optimizer's version of the test, there is usually no more than a 2%
difference.
NYSERDA Manual J Not directly required by NYSERDA; however, Manual J testing is required for BPI heating certification.
Utah Home Performance Simulation Manual J calculation simulated by OptiMiser.
Tucson Electric Power Manual J Energy require the following tests pre and post measure installation as part of the HPwES Program protocols:
Visual home inspection;
Blower Door Test to measure air leakage;
Duct Blaster Test to measure duct leakage;
Manual J calculations for HVAC equipment sizing; and
Infrared test with an infrared camera to determine hot/cold spots and air movement through walls.
These tests enhance the initial energy assessment, lead to more sound efficiency equipment recommendations, and provide verification that measures were implemented correctly and are generating savings for the participant.
5.2.3 Contractor Network
The HPwES Program is a contractor driven program. According to program staff “the program is implemented through our contractors.” Participating contractors are listed on the Austin Energy website, allowing customers to search for and select a contractor that they feel comfortable with to provide the services. The contractor then visits the home to do verification. Austin Energy works closely with the contractors during the process to help ensure that each job is successfully completed. This includes going out with its inspectors and with contractors at verification, and then coming back after the project is complete to make sure that all scheduled work was successfully implemented before Austin Energy signs off on the rebate or loan. All participating program contractors are required to do a minimum of four jobs
Austin Energy HPwES Evaluation Report 2012
every six months. While contractors drive the program, Austin Energy’s relationship with the program contractors is viewed as a critical reason for the program’s success.
5.2.3.1 Recruitment
Austin Energy currently has an extensive contractor network for the HPwES Program;
recruitment does not appear to be a problem. GDS recommends that Austin Energy instead focus on contractor training to ensure that existing partners are well educated and up to date on energy efficiency weatherization practices, building standards and best practices, and HPwES Program goals and requirements. More information on contractor training is provided in Section 5.2.3.3.
5.2.3.2 Requirements
The HPwES Sponsor Guide requires the following of participating contractors:
Job Requirements: For every HPwES job, the contractor must report the job following program administrator procedures and reporting requirements and must provide the homeowner with a professional report.
Field Inspections: The contractor must allow random field inspections by the program sponsor or its designee. At the request of the sponsor, the contractor must make reasonable repairs or correction to work that the contractor has performed to bring work up to program standards at no additional cost of the program participant.
Austin Energy meets these contractor guidelines and also has what they described as a 20%
value rule which means that if a participating contractor fails 20% of their jobs within a six‐
month period they will be pulled from the active list. If a pulled contractor is interested in continuing with the program, Austin Energy will work with them to come up to speed. GDS supports this value rule and recommends that Austin Energy continue to evaluate participating contractors according to these metrics.
5.2.3.3 Certifications & Training
Contractor training is also another aspect of the program that was identified by program staff during the interviews as both a strength and an area for improvement. The whole house approach requires new types of home performance training for contractors and continuous training opportunities for new contractor employees. GDS suggests areas for additional and continued training include blower door testing, Manual D, Manual J, air balancing, and performing whole‐home assessments that go beyond the traditional energy audit. GDS understands that the training process and certain aspects of the training (e.g., orientation and the contractor handbook) are viewed as successful. However, new types of training will be needed as the program continues to expand its whole house approach.
Austin Energy HPwES Evaluation Report 2012
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According to the HPwES Sponsor Guide all participating contractors shall maintain at least one staff member who is certified at the Building Performance Institute (BPI), RESNET or the equivalent. Participating contractors are also required to ensure that certified technicians receive, at a minimum, training that is in compliance with BPI/RESNET/OTHER continued education requirements. Additionally, while working on HPwES jobs – energy audits, installation measures, post‐inspections – participating contractors shall comply with all certification standards governing home performance inspections, diagnostics and treatments.
The HPwES Sponsor Guide also recommends that program administrators offer regular training which should include:
Description of HPwES Program,
Tips for answering HPwES Program questions, and
Information on the economical and environmental benefits of energy efficiency.
GDS conducted a survey of various HPwES Program managers to determine what types of certifications are typical for participating contractors.
For Collins Utilities Yes Partnership with Lightly Treading and Energy Logic with more rigorous requirements than any other HPwES Programs. A mentorship program is also in place.
NYSERDA BPI
Xcel Energy BPI or NATE BPI or NATE (e.g., for AC) depending on expertise. Requires CAZ training as a "band‐aid" for any training that may not include all concepts covered in CAZ.
Nevada Power Company BPI or RESNET
Rocky Mountain Power
Utah Home Performance No
Tucson Electric Power BPI At least one person in the installation crew visiting a household must be BPI certified. The contractor must also be registered with the Registrar of Contractors.
Austin Energy HPwES Evaluation Report 2012
The predominant certifications required by HPwES Programs are BPI and RESNET. A summary of audit requirements under each type certification is presented in the following table.
Table 5‐4: Audit Requirements ‐ RESNET versus BPI28
Area RESNET BPI
Outside Evaluation Required to properly model & rate a home (e.g., model nos. on air handlers, window size, footings, walls, rim joist areas, etc.).
Required for heat loss & savings calculation to be w/in 10% of actual.
Building Orientation Required to actually measure & rate building. Not mentioned or required
Type & Color of
Materials Required to actually measure & rate building. Not mentioned or required
Shading of Exterior
Windows Required to actually measure & rate building. Not mentioned or required
CO Outdoors
Not required. Required to get baseline number and zero it out for
indoor monitoring.
Check Gas Line &
Meter for Leaks Not required. Required to be checked, including gas lines in the house.
Attic Required to measure & rate installation & note problem
Lights & Appliances Type of appliance & percent CFLs to perform calculations. Nothing listed in the Standards for audits.
Blower Door Test Required & similar. Required & similar.
Duct Leakage
Given that the majority of programs reviewed required BPI certification for partnering contractors, GDS recommends that Austin Energy use the BPI certification and guidelines as well for its partner network.
28 “RESNET & BPI – the Pro’s & Con’s.” Weblog entry. SLS Construction: The HTRC: Homeowner’s & Trades Resource Center. Posted September 23, 2010. Date accessed June 15, 2012
Austin Energy HPwES Evaluation Report 2012
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Regular (e.g., monthly or quarterly) trainings are also helpful in developing a superior home performance workforce. As part of the test‐in/test‐out procedures for the initial home assessment and final inspection (see Section 5.2.2), GDS has recommended several tests that are not currently part of the BPI requirements. GDS recommends Austin Energy offer monthly trainings to review program requirements, testing procedures, etc. and that qualify for CEUs to the network of participating contractors, possibly in conjunction with existing or newly‐formed local or regional “associations” of home energy auditors and home performance contractors.
GDS also recommends educating contractors so that there is a better understanding of HVAC commissioning; this has been identified as an area needing improvement in the program. The missing elements of this program (as well as many other existing home energy efficiency programs) is the proper training of home performance contractors to the correct sizing of HVAC equipment and distribution systems (ductwork). In new construction, which is the minimal energy codes and for ENERGY STAR® Homes, right‐sizing has been a focus. However, in existing home programs, it is not often addressed and not often highlighted as an area in which the implementation contractors are well versed. Requiring an element of training that focuses contractor’s attention on the Air Conditioning Contractors of America’s (ACCA) series of manuals that address right sizing will help develop a more educated and highly trained home performance workforce in the Austin area.