Making the building air tight means doing things different from traditional techniques. One example is this hatch that was made to create a seal between the conditioned air upstairs and the unconditioned basement. Another example is the heat recovery ventilator which is closed off in a small closet, to prevent air from the basement from coming up through the walls.
July 24, 2009 4:00 AM PDT
Photo by: Martin LaMonica
| Caption by: Martin LaMonica
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