Humidity Setting For Attic Fans

February 13 2017 by zamira leave a comment.

Humidity setting for attic fans.

Before the advent of air conditioning attic fans or whole house fans were the primary means used to cool residential housing. I believe it is due to the new attic fan which seems to run all the time. 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.

I am in chicago where temperature is around 30 today and humidity about 53. An attic fan works by exchanging the hot air in your attic space for fresh air pulled through the vents. 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.

The difference in setting the thermostat at 90 versus 100 is only a matter of minutes in some roof exposures. 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. 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. In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time.

If the thermostat is set a little bit high the natural convection cooling of the attic ventilation system will bring the temperature down the rest of the way in a reasonably short period of time after the fan shuts off. When the air in your attic becomes super heated it can drastically increase the workload on your air conditioner. Attic fan humidity setting. This will help to avoid premature damage to the shingles or mold building up in moist hot.

Power gable mount attic fan egv5smt attic fans options for home ventilation frequently asked ions master flow solar attic fan 750 cfm dual thermostat humidistat control for. With installation of this new fan the temperature in my house is colder than it was last year by about 2 degrees.