Humidity Controlled Attic Fan

A couple different fan styles can be used to help control the temperature of an attic space.

Humidity controlled attic fan.

Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation. The normal indoor humidity range in winter should be 15. Bought this for my attic fan to help control heat and humidity up there. Attic venting fans are also called attic fans attic ventilators and attic exhaust fans.

Depending on its layout your home may be better suited to one or the. Well the temperature control works great but the humidity control isn t very good finally had to turn it off cause it would just kick on at random times when humidity low and that is the setting that was turning it on. Quietcool smart 2830 cfm power gable mount attic fan at amazon this model is our top pick for its ease of use simple installation and maximum energy efficiency best budget. Their functions differ somewhat.

Here is a link to an article that describes the work. Running at 250 watt and moving over 2860 cfm this fan uses less power than typical attic fans that move half the amount of cfm. Iliving 800 cfm shutter exhaust fan at amazon this fan can easily remove excess heat moisture and odor from any space up to 1 200 square feet. 40 watt solar attic fan bdb with thermostat humidistat adapter 22 5 x 22 5 x 11 in runs at night brushless motor solar vent hail and weather resistant.

In summer the thermostat operates the fan when the attic temperature reaches a preset level usually 90 to 95 degrees f. Air sealing an attic. So the first step is to seal the air leaks. High humidity in an attic is usually caused by air leaks in the ceiling of the top floor of your house.

During winter months humidity from this escaping air can condense on cold attic surfaces leading to mold. How is an attic fan controlled. Even on scorching summer days the air outside your house is nowhere near as hot as the air trapped inside the attic. In winter the humidistat operates the attic fan when the relative humidity exceeds a preset.

Instead you want a whole house fan that is run when the outdoor temperatures are low not when the attic is hot and you want that fan to have a wall mounted switch that you can control. 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. The afg pro 3 0 is possibly the most powerful residential attic fan on the market today. The ideal way to control the operation of an attic fan is with a thermostat and a humidistat.