Build Attic Ventilation

A 30 x 40 ft.

Build attic ventilation.

Power gable vent shutter is designed to be used with master flow egv pg series electric gable fans. 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. Attic for example has an area of 1 200 sq. This is based principally on good historical experience and simple psychrometric analysis handegord giroux 1984.

Measure the gable to decide how large a vent you can. Of vent for every 300 sq. Power gable vent shutter is automatic 20 in. The building code lets you reduce that by half under some conditions but more roof ventilation is usually better.

Although you can buy manufactured gable vents you might want to build your own wooden vent that matches your home or building s exterior. First determine your attic area by multiplying the length by the width. You can also contact your local municipality to check on building code in your area. Then aim for about 1 sq.

In of vent opening per 150 sq. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. This article will cover why you need ventilation the most common type of ventilation the building code requirements and common ventilation related issues. Cool your home lower energy costs and increase efficiency with an attic ventilation fan.

This article will show you how it can be done. Building codes vary. The shutter will open when the electric gable vent is operating. 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.

To better understand attic ventilation it is best to start with the basics. If your attic isn t ventilated well that humid moist air will build up in the attic space and can cause mold to grow. Most building codes require a ratio of 1 150 ventilation space to attic floor space. Therefore whole house fans are best suited for open well vented attics.

In order to facilitate this exchange of warm and cool air the general rule of thumb suggests installing at least 1 sq. Constructed of white aluminum that can be painted.