Sizing Attic Ventalation Fans And Intake Louvers

Exhaust fans force out stale indoor air so it can be replaced by fresh outdoor air.

Sizing attic ventalation fans and intake louvers.

Square white aluminum automatic shutter gable louver vent. Use avp s roof vent calculator to determine the number and size of exhaust vents you will need. Intake vents located at the lowest part of the roof under the eaves allow cool. To find out if you have enough vent space divide the cubic feet of air per minute that the fan is rated for by 300 to come up with the minimum number of square feet of intake vent space needed for that size fan.

They re commonly used to reduce moisture and remove smoke and odors in restaurants residences shop and production floors and commercial buildings. In general there are five types or categories of exhaust vents. This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic. 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.

Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Exhaust fans mount through a cutout in a roof or wall. It s also important to have plenty of soffit or gable vents for the fan to draw air into the attic. Ridge vents power fans traditional electric and solar powered wind turbines gable louvers and roof louvers.

Shed vent door vent built in screen gable vents louvers white gable vents louvers 12x16 return air grille 24 in. 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.