Heat recovery ventilator
8 of 12 from Photos: A Passive House in the making
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When people hear that making a home air-tight improves the energy efficiency, many often wonder about air quality. Because many older homes were made to "breathe," there's typically sufficient air flow for that not to be a problem, according to builder.
Very well sealed buildings, on the other hand, like this one will have a heat recovery ventilator, which brings in outdoor air. It also heats that incoming outdoor air with the air that's been exhausted, as shown on this model.
July 24, 2009 4:00 AM PDT
Photo by: Martin LaMonica
