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Thermal Bridging
Frank Crawford, CPHD, P.Eng
Energy Efficiency Consultant
Asked a question 2 years ago

Who is putting an air admittance valve (cheater valve) on the main plumbing stack of their passive house homes? One 8 meter long plumbing stack with 50mm of insulation in Edmonton Canada results in 170kWh/year in energy loss or $25 of electricity/year, based on the PHPP auxiliary calculation rain water pipe. Are there any air admittance valves available in Canada or are people importing them from Europe?

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Frank, in Alaska I have found them at Home Depot or Lowes. I have not used them myself  so I do not know their quality.