Proper Attic Ventilation For Whole House Fan

It helps to cool your home and attic by up to 30 degrees and more.

Proper attic ventilation for whole house fan. Determine how much net free venting your fan will require. A whole building ventilation fan typically 30 to 130 cfm is different than a whole house cooling fan which is a 3 000 5 000 cfm fan used for night cooling during hot weather references to a california code requirement for insulated shutters on whole house fans refer to the large opening into the attic required for high volume whole house cooling fans. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Proper attic ventilation for whole house fan.

17600 cubic feet 1600 11. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. They remove the hot air out of the house. August 4 2020 by zamira leave a comment.

The issue with a whole house fan is that the hot air needs somewhere to go. What this means is that every eleven minutes the air in the home is being exchanged by a fan of this rating along with having windows open in each room. Making sure you have adequate roof vents which allow the hot attic air to escape is important. You may be able to use the heating and air conditioning ducts in your home as a means of whole house ventilation.

Most building codes require a ratio of 1 150 ventilation space to attic floor space. Using your duct system as a whole house fan. All whole house fans should be installed with rubber or felt gaskets to dampen noise. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca.

Ventilation can be accomplished using various products and techniques. 5 myths about attic ventilation attic fan diagram schematic wiring design attic breeze solar fans venting a bathroom fan into an attic quiet cool whole house fans service. The whole house fan installed inside the attic between the living space and ceiling. If your attic isn t ventilated well that humid moist air will build up in the attic space and can cause mold to grow.

Calculate the appropriate size of a whole house fan needed to properly ventilate your home. Intake vents located at the lowest part of the roof under the eaves allow cool. Divide the cubic feet measurement by the cfm rating assigned to the fan. Take the total cubic feet per minute of air flow cfm of the fan and divide by 750 2.