Should I Vent My Attic

First determine your attic area by multiplying the length by the width.

Should i vent my attic.

However the utility of attic ventilation fans is actually quite a controversial topic. Then aim for about 1 sq. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.

Attic for example has an area of 1 200 sq. These vents allow outside air to enter the attic at the lowest point of the roof along the underside of the eave. If the atmospheric combustion appliances start off in a vented attic the building code doesn t require those vents because the appliances are already connected to the outside and should get plenty of air. The building code lets you reduce that by half under some conditions but more roof ventilation is.

Whole house fans powered attic fans. If your roof has a slope then it should have a ridge vent at the peak of the roof to naturally allow hot air to flow out of the attic. We replaced the roof recently and when we did we added a ridge vent. In a properly designed passive system air enters through the soffit.

It s expected that the air will come through the soffit vents into the attic space but that s not always the case. In of vent opening per 150 sq. The ventilation that controls moisture from condensation and regulates the temperature in your attic relies on air circulation. Worse yet inadequate insulation is almost surely allowing moisture laden air into your attic.

Unless your roofing system has insulation on the roofing deck and is designed without ventilation your furnace should not be heating your attic. Good insulation reduces fan effectiveness. Many homes do not have air tight barriers between the attic and the living space. Whether the home is old or new however anyone considering spray foam insulation would be wise to ask this question.

How many vents do you need. Fans and vents may be installed on the roof system that will draw the air out of the attic space and exhaust it to the exterior. These fans may be controlled by a switch or a thermostat which detects heat build up in the attic space and automatically exhausts the attic space. As built the attic of our 22 year old house was ventilated with gable vents and soffit vents.

The downside of attic ventilation fans. A 30 x 40 ft.