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Attic fans work best at night when the outside temperature cools and that air is drawn into your warm home to cool it off.
Should an attic fan run all the time?
Generally speaking, an attic fan should run as long as it takes to replace all the attic air with outside air. Usually, this takes roughly 15 minutes. However, you can calculate a much more accurate time by dividing the strength of your fan by the volume of your attic space.
What temperature should attic fan turn on?
When it comes to an attic fan’s temperature setting, it’s best to adjust it to anywhere from 90 to 110 degrees Fahrenheit. It’s impossible to state a single number because your attic can effortlessly soar above 95 degrees (on average).
What temp should attic fan be set at in winter?
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.
What is purpose of attic fan?
Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents (soffit and gable) and pushing hot air to the outside.
When should I run my attic fan in the summer?
During the summer the fan should operate anytime the attic temperature is above the comfort level desired for the indoor living quarters. For example, if the air conditioning thermostat is set to 74 degrees, the attic fan might be set to 75 degrees.
Do attic fans use a lot of electricity?
Attic fans are incredibly efficient. They use a fraction of the electricity your air conditioning system uses. They also decrease your need for air conditioning, which lowers your monthly utility bills.
How hot is an attic on a 90 degree day?
More often than not, attic temperatures will be in excess of 125 degrees on a 90 degree day. This will overwork your air conditioning equipment, run up your utility bill and shorten the life of your roof. Ridge vents help – excessive heat can escape through ridge vents.
Do attic fans turn on automatically?
An attic fan is normally automatic. An adjustable thermostat, which is included, turns the fan on and off according to the temperature. If you have a humidistat installed, it turns the fan on and off as well according to the humidity.
How hot is an attic on a 100 degree day?
Thanks to the radiant heat affect, attic temperatures on a 100-degree day can reach 170 degrees or more.
Is my attic too hot?
Hang an outdoor thermometer in your attic, making sure its range reaches at least 130 degrees Fahrenheit. Hang pencil and paper next to the thermometer and record the outdoor and attic temperatures for several hot days. * Note excessive heat.
Will attic fan help in the summer?
In the summer, a properly installed attic fan can remove excessive heat build up, providing cooling to an attic space. This helps reduce the pressure on your insulation systems, preventing unwanted heat transfer into your living space.
Can an attic fan cause a fire?
“Most attic fans are put up there and forgotten,” says Kenneth Kent, deputy marshal of the Arlington County Fire Department. “They’re not inspected for years, and when they malfunction, they can start a fire.”Jul 19, 1994.
How do I get hot air out of my attic?
Install electric ventilators and attic fans, which remove hot air from an attic. They have thermostats that turn the fan on at a recommended preset temperature of 100-110 degrees. Alternatively, install passive vents such as gable, soffit and ridge vents, which are openings in the roof that allow hot air to escape.
Will attic fan help keep upstairs cooler?
The installation of an attic fan will help to move all of that hot air back outside, thereby lowering your attic temperature by up to 60 degrees. With a cooler attic there is less heat overflow into the upstairs of your home. According to atticfans.com an attic fan: Lowers upstairs room temperatures by 10º.
Do attic fans run in the winter?
Your attic fan runs during winter regardless of the temperature to bring in dry outside air to replace damp attic air and prevent mold from starting in your attic. Your Jet Fan Attic Fan Humidistat should be set to 70 -75% relative humidity.
How many degrees does attic fan reduce temperature?
An attic fan operating on a hot day can reduce the temperature in your attic by as much as 50 degrees. And with reduced temperatures in the upper levels of you home, your air conditioner will begin working more efficiently to cool the rest of your home.
Does attic fan reduce the electric bill?
One of the best ways to save money on cooling your house is to install a whole house fan along with an attic fan. These fans keep you from needing to run an A/C unit at all hours of the day, which will save a lot of money on your electric bill.
How long do attic fans last?
Typically, attic fans have a lifespan of up to 15 years as long as they are properly maintained. This usually involves having the attic fan professionally serviced by an HVAC technician who will clean the fan shutters, lubricate the oil ports, and wash the fan blades as well as inspect the unit for any repairs needed.
Do attic fans have thermostats?
A powered attic ventilator, or attic fan, is a ventilation fan which regulates the heat level of a building’s attic by exhausting hot air. A thermostat is used to automatically turn the fan off and on, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted.
