Proper Attic Ventilation For Whole House Fan

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.

Proper attic ventilation for whole house fan.

Divide the cubic feet measurement by the cfm rating assigned to the fan. Multiply the number of square feet of the floor area you want to cool by the room height from floor to. August 4 2020 by zamira leave a comment. If your attic isn t ventilated well that humid moist air will build up in the attic space and can cause mold to grow.

The warm air then escapes through the attic and to the attic vents allowing the circulation of fresh air from the windows. 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. You can set a multi speed fan to a lower speed when noise is a problem.

Determine how much net free venting your fan will require. Calculate the appropriate size of a whole house fan needed to properly ventilate your home. Most building codes require a ratio of 1 150 ventilation space to attic floor space. 17600 cubic feet 1600 11.

Take the total cubic feet per minute of air flow cfm of the fan and divide by 750 2. Intake vents located at the lowest part of the roof under the eaves allow cool. The issue with a whole house fan is that the hot air needs somewhere to go. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed.

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. Proper attic ventilation for whole house fan. It helps to cool your home and attic by up to 30 degrees and more. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

You may be able to use the heating and air conditioning ducts in your home as a means of whole house ventilation. They remove the hot air out of the house. All whole house fans should be installed with rubber or felt gaskets to dampen noise. Making sure you have adequate roof vents which allow the hot attic air to escape is important.