Attic fan
An attic fan, is a fan that controls the heat level of a building's attic by removing the hot air. A thermostat is used to turn the fan off and on based on the heat level, while sometimes a manual switch is used. An attic fan can be gable mounted or roof mounted. Extra vents are required to draw in fresh air as the hot air is exhausted. Attic fans are typically used in warmer months when temperatures in an attic can get above . A fan may be installed in an attic for the purpose of cooling a whole house by venting hot air out via the attic. These fans are often called whole-house fans.