The ideal way to control the operation of an attic fan is with a thermostat and a humidistat.
Attic fan humidity setting for winter.
In summer the thermostat operates the fan when the attic temperature reaches a preset level usually 90 to 95 degrees f.
The results are that the attic temperature is close to the outside temperature but the relative humidity is significantly higher in the attic than either the indoor or outdoor readings.
With installation of this new fan the temperature in my house is colder than it was last year by about 2 degrees.
How is an attic fan controlled.
A humidistat is a device on humidifiers that regulates the amount of relative humidity inside a home or building.
Of course some environments are much hotter than others so this will be the perfect time to measure out how warm your attic will get during the most heated of seasons.
Controlling indoor humidity levels can make the air feel cooler or warmer thus making the air more comfortable.
I believe it is due to the new attic fan which seems to run all the time.
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The normal indoor humidity range in winter should be 15.
Attic fan humidity setting.
In areas with high humidity homeowners should install a humidistat which will start the fan when a certain humidity level is reached to reduce the amount of moisture in the attic limiting mold and rot.
I have a new attic fan w thermostat set at 110 and humidistat set at 60.
When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
What temperature should attic fan be set at.
In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.
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Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation.
In winter the humidistat operates the attic fan when the relative humidity exceeds a preset.
Winter air is by nature not humid so the problem must be condensation related.
Because there is less natural humidity in the air during the cold winter months the humidistat settings must be altered.