Attic Temperature Differential Winter

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.

Attic temperature differential winter.

These images came from a presentation danny parker gave pdf on fsec s cool roof research the third graph shows attic temperatures from the middle of the attic for several different types of roofing as well as a sealed attic. After the worst winter we ve had in a long time and the ice ripping the gutter and fascia board off my house i d had enough. My house is a 1979 basic ranch style house and ive always had bad ice problems. In south florida the typically daytime temperature might be 92 degrees to 95 degrees and the attic temperature might vary from 120 degrees for a tile roof to 140 degrees for a dark color shingle roof.

If your attic soars above 100 degrees and reaches the 150 mark its time to consult. Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures. During the winter yes but not during the summer. As snow accumulates it alters the temperature profile of an attic and roof surface.

Thermostat setting adjusts from 60 120 degrees f normal settings are 85 110 degrees f. Adjustable thermostat and humidistat control has 10 amps 120 volts ac. The white roof lowered the attic temperature by about 20 f. Snowpack on a roof covering vents of any type alters the airflow from ventilation thus altering the.

Attic ventilation i am providing here a bit of background information because this is a very canadian problem and mostly unknown to people in less extreme climates such as e g europe. The summers are very warm and the winters cold. The temperature difference between summer and winter are here about 70 c.