Sizing Attic Ventalation Fans And Intake Louvers

This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.

Sizing attic ventalation fans and intake louvers.

It s also important to have plenty of soffit or gable vents for the fan to draw air into the attic. The ravc recommends never mixing two types of exhaust vents on the same roof above a common attic because it could short circuit the attic ventilation system. Fan related products 19 25 in. Use avp s roof vent calculator to determine the number and size of exhaust vents you will need.

For balanced ventilation an equal amount of intake vent area net free area should also be installed. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Intake vents located at the lowest part of the roof under the eaves allow cool. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.

They re commonly used to reduce moisture and remove smoke and odors in restaurants residences shop and production floors and commercial buildings. Ridge vents power fans traditional electric and solar powered wind turbines gable louvers and roof louvers. Exhaust fans force out stale indoor air so it can be replaced by fresh outdoor air. In general there are five types or categories of exhaust vents.

Square white aluminum automatic shutter gable louver vent. Exhaust fans mount through a cutout in a roof or wall. Iliving 16 wall mounted exhaust fan automatic shutter variable speed vent fan for home attic shed or garage ventilation 1200 cfm 1800 sqf coverage area 4 6 out of 5 stars 487 109 77 109.