How Much Roof Venting For 6000 Cfm House Fan

You can only bring in as much air as you can discharge out of your attic vents.

How much roof venting for 6000 cfm house fan. To calculate the amount of attic exhaust area you will need divide the fan s capacity in cfm by 750. This will give you the amount of net free venting in square feet required for the fan you select. Take the total cubic feet per minute of air flow cfm of the fan and divide by 750 2. With a power switch or a thermostat installation an attic fan can be turned on to let hot air from the attic out.

The downside of attic ventilation fans. Whole house ventilation allows you to bring the cooler outdoor air through your windows home and attic space to thoroughly cool and ventilate both the home and attic. The quietcool brand of whole house fans has taken america by storm. That translates to one attic vent 3 feet by 3 feet or two attic vents.

Good insulation reduces fan effectiveness. The qc es 6000 advanced whole house fan is a new take on the idea of whole house ventilation. A wind turbine catches the wind and spins a fan which pulls hot air outside. The higher the cfm the more venting area is required to keep the system working efficiently.

Let owens corning roofing help you calculate exactly how much ventilation you will need for a healthy and balanced attic with our 4 step ventilation calculator. Roofing resources during covid 19 for contractors for homeowners. We always recommend at least having 1 sqft of net free area venting for every 750 cfm in your system. Dangers of too much ventilation.

Understanding whole house fan cfm. If you need 6 000 cfm of air flow through your house divide 6 000 by 750 to get a minimum 8 square feet of attic venting. Here is an example. So at 3000 cfm you ll want six square feet of venting.

Having an understanding of this makes choosing the correct fan size for your home an easier process. Airflow is measured in cubic feet per minute cfm. Determine how much net free venting your fan will require. Attic ventilation fans whether hard wired or powered by their own solar panels seem like a low cost and effective way to help keep your house cool.

Whole house fans come in a variety of sizes determined by the amount of air they circulate or whole house fan cfm. However the utility of attic ventilation fans is actually quite a controversial topic. For proper cooling and efficient operation any whole house comfort ventilator requires adequate unobstructed outlets in the attic through soffit vents grilles or louvers. A rule of thumb is you should have one square foot of net free venting area for every 500 cfm of airflow.

Cubic feet per minute or cfm is the amount of cubic feet of air per minute the fan moves.