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How can I convert an imperial U-factor to a metric U-factor?
U-factor can be expressed in metric units (W/m2·K) or imperial inch-pound units (Btu/h·ft2·F). To convert imperial u-factors to metric u-factors, multiply by 5.678. Example: My contractor has given me a quote for five new windows that I would like to replace. My contractor says they have a U-factor in imperial units (Btu/h·ft2·F) of 0.21 and…
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Why does the rebate only apply to windows that are ENERGY STAR® Certified with a maximum U-factor of 1.22 (W/m2·K)?
The window and door rebate is designed to assist with the additional cost of investment in highly energy efficient windows. ENERGY STAR certification with an U-factor < 1.22 (W/m2·K) is an industry benchmark for above average window performance, as well as Provincial and Federal policies on energy efficient equipment in the building sector.
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Why is a variable speed compressor required for many heat pump rebates?
A variable speed compressor is an inverter driven compressor that can adjust its operating speed to match a home’s heat demand. Compared to conventional systems, variable speed systems have higher customer satisfaction rates, increased energy savings and less impact on the electrical grid. For these reasons, a variable speed compressor is required for mini-split, multi-split,…
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What Region is used for the HSPF rating requirements for heat pump installations? Region 4 or 5?
The minimum HSPF rating requirements for all heat pump installations are based on Region 4, regardless of location. Unless otherwise specified, manufacturers’ published HSPF ratings and the HSPF ratings published in the Air-Conditioning, Heating, & Refrigeration Institute (AHRI) Directory of Certified Product Performance are based on Region 4. The ratings found in the AHRI directory…
