Attic Need Supplimental Cooling Fans

Whole house fans need windows and doors open and attic fans need lots of soffit vents to suck cooler outdoor air up into the hot attic.

Attic need supplimental cooling fans.

They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner. The ventilation that controls moisture from condensation and regulates the temperature in your attic relies on air circulation. With a hot attic the ceiling heats the building.

Whole house cooling using a whole house fan can substitute for an air conditioner most of the year in most climates. The attic cools and the attic fan goes off. I ve had better success with insulation between the rafters and the hot roof radiates more to the surroundings. In a properly designed passive system air enters through the soffit.

By installing ceiling fans or using floor fans you can help to better distribute the cold air that comes from your air conditioner. Whole house fans combined with ceiling fans and other circulating fans provide acceptable summer comfort for many families even in hot weather. Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. That said air resistance and interference such as vent grates reduces the area of true ventilation.

In other words the entire vent opening doesn t count as vented space. Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape. The a c usage goes down. Install electric ventilators and attic fans which remove hot air from an attic.

A whole house fan can be run from early evening to early morning effectively cooling the structure of your home using the cool free outside air. In addition to whole house fans the ducts of your central heating and cooling system can be modified to provide whole house cooling. When combined however they form a perfect union. Additionally by aiding your central air conditioner fans lessen the workload of your hvac system thus reducing the helping to lengthen its lifespan.

Make sure that your attic is well insulated. So it s natural to think of cooling the attic. A fan cools things. Without this open space the fans will not move much air.