Humidity Setting For Attic Fans

I believe it is due to the new attic fan which seems to run all the time.

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. 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. Attic temperatures can reach upwards of 150 degrees in the summertime and an attic fan can help evacuate the hot air and humidity that can build up. The difference in setting the thermostat at 90 versus 100 is only a matter of minutes in some roof exposures.

An attic fan works by exchanging the hot air in your attic space for fresh air pulled through the vents. 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. 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.

I am in chicago where temperature is around 30 today and humidity about 53. I have a new attic fan w thermostat set at 110 and humidistat set at 60. In particularly hot climates set the temperature higher to keep the fan from running for extended periods of time. With installation of this new fan the temperature in my house is colder than it was last year by about 2 degrees.

Proper humidistat setting attic fan june 27 2019 by zamira leave a comment dual thermostat humidistat control for attic fan installation how to install master flow 1500 cfm black power roof jet fan journals attic attic fans green air solutions. 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. 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. February 13 2017 by zamira leave a comment.

Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation. This will help to avoid premature damage to the shingles or mold building up in moist hot.