What should my attic fan humidistat be set at?


Cedrick Dempsey   |   Member since 2020  |  10+ Answers Submitted  |  ✔ Verified

In summer, the thermostat operates the fan when the attic temperature reaches a preset level (usually 90 to 95 degrees F). In winter, the humidistat operates the attic fan when the relative humidity exceeds a preset level (usually 40 to 50%).

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Fred Rodwell   |   Member since 2019  |  10+ Answers Submitted  |  ✔ Verified

Likewise, what is the recommended humidity setting for an attic fan?

The normal indoor humidity range in winter should be 15 to 50 percent. For example, if the indoor temperature is 70 degrees and the outdoor temperature is 20 degrees, then the recommended humidity level is 45 percent.

Secondly, are attic fans with humidistat effective? Yes, the humidistat works very well. I believe the manufacturer would want it wired in parallel with any other controller, such as a thermostat. Wiring it this way allows the fan to come on wether it's hot or humid, or both. Trade: Installing windows, siding, roofing, doors, patio rooms, gutters and shutters.


Brooklyn Addley   |   Member since 2019  |  10+ Answers Submitted  |  ✔ Verified

Consequently, what should attic fans be set at?

Attic Fan Temperature Setting Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets. Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees Fahrenheit.


Bryon Devonport   |   Member since 2007  |  10+ Answers Submitted  |  ✔ Verified

Should an attic fan run all the time?

If your attic fan seems to be running constantly, it would be a good idea to bring in a professional to check it out and make sure it's still working properly. If the “switch on” temperature is set too low, you can bet that the fan will run all summer long and create a noisy disturbance.


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Related Answered Questions

Below is a list of answers to questions that have a similarity, or relationship to, the answers on "What should my attic fan humidistat be set at?". This list is displayed so that you can easily and quickly access the available answers, without having to search first.

Sarah Irwin   |   Member since 2010  |  ✔ Verified

What temp should attic fan be set at in summer?

90 to 95


Cassidy Yarlett   |   Member since 2008  |  ✔ Verified

Can you run an attic fan all day?

Only use your fan when the outdoor air is cooler than your indoor air. Make sure your A/C is off when you run the fan to avoid wasting energy. We recommend running the whole house fan all night.


Jolene Harris   |   Member since 2016  |  ✔ Verified

How do you adjust an attic fan thermostat?

Most manufacturers recommend setting your attic fan thermostat between 105-115 degrees, and monitoring how often and how long the fan runs, to adjust the setting for your home.


Tara Pierce   |   Member since 2019  |  ✔ Verified

Is attic fan necessary with ridge vents?

Vents in the soffit beneath the eaves at the bottom of the attic draw in cool outside air while gable or ridge vents at the peak of the attic allow heated air to exit. Combining an attic power vent fan with a ridge vent is usually not recommended because: It could reverse the natural flow of hot air out the ridge vent.


Dasha Hudson   |   Member since 2014  |  ✔ Verified

Should I run my attic fan in the summer?

Running an attic fan during the hottest part of the day lowers the temperature in your attic by as much as 50 degrees. This translates to temperatures roughly 10 degrees cooler throughout the rest of your home.


Gloria Plumb   |   Member since 2015  |  ✔ Verified

Do roof vents help cool house?

When installed properly, roof vents can help keep your home cool, reduce humidity and prevent mold growth. When installed properly, roof vents can help to keep the home cool, reduce humidity and prevent mold growth.


Bree Richards   |   Member since 2008  |  ✔ Verified

Does an attic fan reduce humidity?

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. Installing an attic fan to vent the hot air will reduce the workload on your air conditioner, which in turn reduces your energy costs and saves you money.


Rick Vernon   |   Member since 2011  |  ✔ Verified

How do you turn off an attic fan?

All they do is suck hot air out of the attic and blow it outside. They are hard wired and have a thermostat switch on them. In order to turn it off you have to crawl up to it an adjust the thermostat to the highest setting.


Boris Emerson   |   Member since 2014  |  ✔ Verified

How do you run an attic fan in the summer?

Open your windows before you turn on the fan. A whole-house fan is usually installed on the attic floor near the center of your house. In the late evening or early morning, the fan is turned on to exhaust hot air from the house. Cooler outdoor air enters through open windows, lowering the indoor temperature.


Chadwick Woodcock   |   Member since 2006  |  ✔ Verified

How long should an attic fan run?

Natural Cooling Some attic fans are designed with thermostats and turn on automatically when the air reaches a certain temperature. Simpler fan models generally have on-off switches or dials that allow you to run the fan for a specified amount of time, such as 15 minutes.


Elijah Turner   |   Member since 2018  |  ✔ Verified

Does an attic fan need its own circuit?

An attic fan will typically need 4 to 5 amps of service. If an existing circuit nearby cannot handle the added load of an attic fan, you may need to run a new 15-amp circuit to the space. The fan will also require electrical connections to power it and the thermostat to control when the fan runs.


Ramon Power   |   Member since 2019  |  ✔ Verified

Should an attic fan run in the winter?

During the winter, the heat is constantly running inside your house. Since heat rises, it can get trapped in your attic, and that hot air is moist. To combat moisture buildup, a fan in the attic is essential. It circulates the air and prevents the moisture from building up.


Celia Ring   |   Member since 2014  |  ✔ Verified

How hot should your attic be?

Attics can reach temperatures of 150 to 160 degrees F during a summer day, although outside air temperatures are only 95 to 97 degrees F.


Aeris Dann   |   Member since 2014  |  ✔ Verified

Can you run an attic fan with the AC on?

Essentially, you can use your AC unit and your whole house fan together. However, if the air outdoors is cooler than the air indoors, it doesn't make a whole lot of sense to turn your air conditioning system on.


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