Proper Sizing Of Attic Fan

This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.

Proper sizing of attic fan.

In terms of sizing your ceiling fan for your bedroom there are two common size options for bedrooms. If you have a regular sized bedroom of 144 to 225 square feet then a medium ceiling fan with a blade span of 44 to 50 inches will be a great fit. By dispelling hot air from your attic an attic fan can reduce the temperatures of your upper level rooms by 10 degrees extend the life of your roof shingles and cut air conditioning expenses by up to 30 percent. By sizing and implementing a whole house fan you can pull the warm stale air from your entire home into the attic where it s vented outside.

This is a quick rundown of the different types of attic fans their most common features and. Simultaneously cool fresh air will be pulled through the open windows and circulated through every room effectively replacing all of the air in your home and minimizing your dependence on air conditioning. Next multiply the square feet of attic space by 0 7 to get the minimum number of cubic feet of air per. Whole house fans work on the principle of removing the hot and humid air out of the house.

Divide the result by 60 minutes to find the cubic feet per minute or cfm that your fan must move for whole house ventilation. It helps to cool your home temperatures and the attic by approximately 30 degrees. The whole house fan is installed inside the attic between the living space and ceiling. You will want to check your fan to ensure that its cfm rating is anywhere between 1 600 and 4 500.

Without an attic fan the temperature in your attic can climb to a searing 150 degrees. How to size attic exhaust vent fans for your home attic size. Measure the length and width of the attic floor space to be ventilated. If your whole house fan doesn t have the proper ventilation it s not going to work very well either.

For instance if your house has an overall floor area of 1 500 square.