A solar attic fan on a roof overlooking a lake.

Solar attic fans and carbon monoxide: is there a risk?

One of the frequently cited myths of solar attic fans is that they cause carbon monoxide poisoning in homes. Homeowners often question whether risks outweigh any potential benefits the fans may bring. Independent tests have now disproved these inaccurate claims. The claim In the past, engineers believed that solar attic fans created “negative pressure zones”

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