Air Movement Fan Sealed Attic

For particularly dark or steep roofs we recommend a slightly higher rating.

Air movement fan sealed attic. Seal the gaps with caulk or expanding foam. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. 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. 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.

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. These vents are installed in the gable ends of the home or building. 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. Strongway heavy duty fully enclosed direct drive shutter exhaust fan 14in 1 400 cfm 120 volts 4 blades.

These fans circulate the air within the attic pulling fresh. Attics steel venturi fan blade assembly and motor struts with automatic shutter. There are solar powered options available that should be considered depending upon the location of the fan and the home. Attic fans serve a different function removing the hot and moist air from the attic and leaving the space below the attic floor alone.

If air movement between inside and outside is accidental we call it infiltration. 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. 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.

Powered attic ventilators should provide at least 10 air changes per hour. 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. Duct through corner of closet from attic back to crawl to circulate dry attic air and close the foundation vents. Check for gaps in your attic that facilitate air movement by checking for dirty insulation.

When complete and dry push the insulation back into place. Shop 351 attic fan at northern tool equipment. Replacement of stale inside air with fresh outside air is called ventilation.