Hot Air From Attic Behind Wall

These fans are commonly mounted in an upstairs stairwell or hallway ceiling where there s at least 3 ft.
Hot air from attic behind wall. Of clearance above the fan. They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees. A powerful fan draws cooler early morning and evening air through open doors and windows and forces it up through the attic and out the roof vents. The opposite happens in cold weather thus your improved temperature balance in winter.
Attic ventilation fans are a type of attic fan that cools attics by pushing hot air outside while pulling in cooler air from soffit and gable vents. This sends hot air up and out cooling your house and your attic. Your vents can get clogged from dirt rust or insulation that was blown in from the attic. Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape.
Seal all attic air leaks. Reverse stack effect in hot weather will create a highway of hot air from your attic into the house especially the upstairs. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. There are probably many small air leaks in your attic space which can cause a major source of heat loss in many homes.
Make sure they are all open and will allow for the maximum amount of air to pass through.