Average Attic Temperature In Winter

Install electric ventilators and attic fans which remove hot air from an attic.

Average attic temperature in winter.

January 8 2010 5 15pm text size. Attic temperature depends on the amount of solar radiation construction details and the rate of ventilation. In particularly hot climates set the temperature higher to keep the fan from running for extended periods of. Most attic fans operate with a thermostat that automatically turns the fan on and off based on a temperature the homeowner sets.

Calculations indicate that on a july day in texas a ventilation rate of one air change per minute for a typical attic using 95 degree f air will lower the peak attic temperature to about 101 degrees f. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. Your attic temperature should be at or near the outside air temperature if it is well ventilated and does not leak warm air into the attic from below. What temperature should attic fan be set at.

Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape. They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees. Summer attic air temperatures with old terra cotta colored asphalt shingles peaked at 140 to 145 at 18 above the blown in fiberglass insulation layer at the attic floor. When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.

Summer attic air temperatures with reflective roof peak at or slightly above outdoor air ambient. Hot summer weather poses the opposite problem for maintaining recommended attic temperatures. Providing half air change per. Most manufacturers and contractors recommend a temperature setting between 100 and 110 degrees fahrenheit.

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