Heating & Cooling Systems

More resources for this category are located on the Green Built Homes Certification Levels page — under Phase 4: Heating & Cooling Systems as well as our Heating & Cooling Systems Resources page:

Hot water recirculating loops: the most problematic “green feature” out there right now

Hot water recirculating loops are having a moment. They’re popular with plumbers because they reduce callbacks homeowners who don’t want to run their taps and wait for hot water. They’re

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