Attic Temp Is 150

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.

Attic temp is 150.

Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. However more often than not. A standard powered exhaust vent turns on when the temperature inside the attic reaches a pre set limit and runs until the temperature drops. If it s 90 degrees outside the attic temperatures shouldn t exceed 110 according to home inspector jamison brown of amerispec home inspection services in poquoson.

If your attic soars above 100 degrees and reaches the 150 mark its time to consult professionals. They have done much of their testing in las vegas and phoenix where conditions are the worst and 150 degree attic temperatures are common. The cooling load for a home air conditioner depends on the difference in temperature between the inside and outside air and reduction of attic temperatures from 155 degrees to 105 degrees f will result in a significant reduction in cooling load. An unventilated attic can reach 150 degrees in the heat of summer 50 degrees higher than it should be.

If your attic is not properly ventilated your cooling costs will not be as low as they should be because your system is constantly running to compensate for the excess heat. If the absorptivity of the roofing material is 0 92 the model predicts that the maximum hourly temperature for the roof sheathing plywood is 140 f 60 c and the maxi mum predicted exterior roof membrane temperature is 150 f 66 c. While these powered vents do effectively draw out the. It s also been found that roofing design and materials have more effect on attic temperature than ventilation.