How Many Solar Attic Fans Do I Need

Solar blaster attic ventilation calculator how many vents will my house need.

How many solar attic fans do i need.

The amount of ventilation an attic needs is determined by many factors. These size areas requiring ventilation may only require the use of 1 x 15w green vent solar attic extraction fan. Many are solar powered and require no other wiring so they don t cause any additional charges on your electricity bill at all. According to the home ventilating institute hvi powered attic ventilators need to move a minimum of 700 cubic feet per minute cfm for 1 000 sq.

Calculate how many solar attic fans you need to achieve proper ventilation with this free helpful attic fan size calculator from energy efficient solutions. Ft of attic space for example 20 x 50 to be effective. Download solar attic fan estimator sheet pdf. The charts below should be used as a general guideline for how many solar attic fans are needed for residential installations based on square footage and roof pitch.

Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation for every 300 square feet of attic floor space evenly split between intake and exhaust.