Air Movement Fan Sealed Attic

Replacement of stale inside air with fresh outside air is called ventilation.

Air movement fan sealed attic.

Powered attic ventilators should provide at least 10 air changes per hour. There are solar powered options available that should be considered depending upon the location of the fan and the home. Multiplying the total square footage of the attic by 0 7 will provide the rate required. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

Designed for houses with 1 200 1 800 sq. When complete and dry push the insulation back into place. These fans circulate the air within the attic pulling fresh. Whole house fans offer an efficient way to reduce cooling costs by pulling fresh air in from the outside expelling the warm air up into the attic and pushing it out through the attic exhaust vents.

Intake vents located at the lowest part of the roof under. Attics steel venturi fan blade assembly and motor struts with automatic shutter. They are normally louvered vents that allow air to be drawn out of the attic space but prevent moisture from rain and snow from blowing back into. Seal the gaps with caulk or expanding foam.

Strongway heavy duty fully enclosed direct drive shutter exhaust fan 14in 1 400 cfm 120 volts 4 blades. Check for gaps in your attic that facilitate air movement by checking for dirty insulation. Ventilation can occur naturally aided by the stack effect and open windows or mechanically with the use of a fan or series of fans that pull air in or out of the house. For particularly dark or steep roofs we recommend a slightly higher rating.

Ideally no services such as hvac distribution ducts air handlers plumbing or fire sprinkler systems should be located external to the air barrier figure 3. The air being exhausted must be replaced by outside air drawn through vents under the eaves in the soffit. Therefore an air barrier at the ceiling line such as sealed gypsum board should be present to isolate the attic space from the conditioned space. Place 40 ft drainage pipe with holes across center floor of dirt crawl space attach this to duct line to attic space with an inline 90 cfm silent exhaust fan at the other end of attic run a 6 in.

Attic fans serve a different function removing the hot and moist air from the attic and leaving the space below the attic floor alone. 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. Duct through corner of closet from attic back to crawl to circulate dry attic air and close the foundation vents.