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EERE » BTO » Building America » Solution Center Home » Image Gallery » Some whole-house fans use an automatic insulated cover achieve high R-values when the fan is not in use

Some whole-house fans use an automatic insulated cover achieve high R-values when the fan is not in use

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Some whole-house fans use an automatic insulated cover achieve high R-values when the fan is not in use

Courtesy Of

Tamarack Ventilation

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