The fan is warranted for five years, draws a mere 3.2 amps and is capable of handling an attic area up to 1500 sq. ft. Its thermostat is installed in a control box and is prewired.

The Airlift T14 attic wall-mounted exhaust fan has some high-tech features as well. It has a thermostat with humidity control, timers, alarms, speed adjustments, and more—all programmable from ...

The hard-wired version is thermostatically controlled to kick on when the attic reaches a certain temperature. True, they do use electricity from the grid, but usage is minimal.

These thermostatically controlled fans are supposed to push out the upper attic hot air and draw in cooler outside air, usually through the soffit vents.