Attic Fan Humistat Control . QuietCools Smart Gable Mount Attic Fan is our top pick for its ease of use simple installation and maximum energy efficiency. Your attic fan runs during winter because you probably have a humidistat control on your attic fan so it runs when attic relative humidity is too high.
So to be safe we recommend setting your humidistats relative humidity RH to 58 percent and setting your thermostat temperature between 77 and 80 degrees Fahrenheit. Ideally your installer would have found a way to increase the vent openings in your attic so that a whole-house fan could be installed. Click to see full answer.
The idea is for the fan to draw in dryer air from outside to get rid of water vapor that has risen up into the attic from the rooms through gaps in the vapor barrier or worse through improperly vented bath fans.
Ken yeah encapsulating the attic with spray foam and then walking away especially in a humid climate is a recipe for disaster. You might also install a humidistat that automatically turns your attic fan on to vent out humidity once the level exceeds 70 percent. Humidistat Thermostat Control Dial Humidity Control Dial The DuoStat by Ventamatic Ltd. Check out results for Humidistat fans.
