Build Attic Ventilation

Therefore whole house fans are best suited for open well vented attics.

Build attic ventilation.

To lower attic temperatures and to remove. This article will cover why you need ventilation the most common type of ventilation the building code requirements and common ventilation related issues. Then aim for about 1 sq. Attic fan ventilation attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside.

If your attic isn t ventilated well that humid moist air will build up in the attic space and can cause mold to grow. Of vent for every 300 sq. To better understand attic ventilation it is best to start with the basics. Constructed of white aluminum that can be painted.

Building codes vary. Attic ventilation serves two main functions. The recommended ventilation ratio to provide for vented attic assemblies when an air barrier is present is the 1 300 ratio as specified by most building codes. In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq.

Cool your home lower energy costs and increase efficiency with an attic ventilation fan. A 30 x 40 ft. You can also contact your local municipality to check on building code in your area. This is based principally on good historical experience and simple psychrometric analysis handegord giroux 1984.

Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans. The shutter will open when the electric gable vent is operating. However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic. Power gable vent shutter is automatic 20 in.

Attic for example has an area of 1 200 sq. Most building codes require a ratio of 1 150 ventilation space to attic floor space. In of vent opening per 150 sq. Although you can buy manufactured gable vents you might want to build your own wooden vent that matches your home or building s exterior.

Measure the gable to decide how large a vent you can. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.