The ideal way to control the operation of an attic fan is with a thermostat and a humidistat.
Attic fan winter humidity setting.
Set the humidistat knob on the humidifier to the following winter settings as recommended by the ask the builder website.
Controlling the humidity levels of your attic is also important as it can easily make or break the performance of your hvac systems.
If the outdoor temperature is near 10 f set the humidistat to 20 percent.
Since your attic can effortlessly soar above 95 degrees on average it s best to make sure that this space doesn t reach ten degrees above the day s forecast as many industry professionals can agree on.
Eliminating mold and mildew on the roof structure is the ultimate goal.
This reduces attic moisture.
In winter the humidistat operates the attic fan when the relative humidity exceeds a preset level usually 40 to 50.
If the temperature is near 0 f set the humidistat to 25 percent.
If the outdoor temperature is near 10 f set the humidistat to 30 percent.
Known as the primetime for heat and humidity this is one of the most important seasons to make sure that your attic fan is adjusted correctly.
What stands out is the high relative humidity inside the house.
In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.
In the winter plastic often becomes very brittle making it easy to snap a fan blade under normal use.
It could be that despite having done what.
For example if the indoor temperature is 70 degrees and the outdoor temperature is 20 degrees then the recommended humidity.
When the temperature within the attic reaches a set point the fan will turn on and.
How is an attic fan controlled.
At 48 52 you re at the upper tier of the recommended 35 50 during heating season.
Winter air is by nature not humid so the problem must be condensation related.
Master flow manually adjule humidistat for power vents h1.
Attic fans green air solutions heating conditioning los.
Dual thermostat humidistat control for power attic ventilators.
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.
Normally the humidistat setting should range between 15 to 50 percent.
When it comes to humidity you would be best to have the levels below 50 to avoid mold growth and structural rot.
However it should also depend on the season the temperature outdoors as well as indoors.
Dayton 2 spst attic fan thermostat humidistat with 60 to 120 f.
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