Attic Fan Size

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Attic fan size.

To determine the size of your attic multiply the width by the length of the attic floor in feet. 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. 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. Cfm cubic feet per minute is a measure of the amount of air the fan moves in a minute.

An attic fan works by exchanging the hot air in your attic space for fresh air pulled through the vents. An attic fan is an electric exhaust fan that mounts in your home s attic. 20 x 50 1 000 sq. For a single story house this is usually the same as the square footage of the house itself plus any attached garage area.

Example 20 wide by 50 long attic. 1150 cfm galvanized steel electric powered attic fan with adjustable thermostat model gf 14 429 00 429 00. The inexpensive fans can help reduce heating and cooling costs by evacuating superheated or cold air from your home s. This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.

Master flow 1450 cfm silver electric powered gable mount electric attic fan model egv5smt view the master flow gable vents 118 00 118 00. This will help to avoid premature damage to the shingles or mold building up in moist hot. The whole house fan is installed inside the attic between the living space and ceiling. Whole house fans work on the principle of removing the hot and humid air out of the house.

The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows. The formula above gives an approximate. Attic fan size calculation attic fan size cfm 0 7 x sq ft area of the attic formula 1 the size of an attic fan is calculated in terms of cfm.