Instead, choose a fan with metal construction. Body and fan should be made of sheet metal and steel, galvanized or painted if possible. These materials are much more stable than plastic at fluctuating temperatures and resist moisture well. Most manufacturers recommend sizing an attic fan at 2 to 3 CFM (cubic feet of air per minute) per square foot of living space.
Typically, this recommendation is based on where your home is located. Find the total air volume in your home. Measure the length and width of each floor in your house with the measuring tape. Multiply the length by the width of each plant with the calculator.
Add the floors to find the total square foot area of your floors. Multiply the total floor area by the average height of your ceiling tiles to calculate the total air volume in cubic feet. Measure the area of the attic vents. Requires a minimum of 1 square foot of attic ventilation per 750 CFM of airflow.
If you need 6000 CFM of airflow through your home, divide 6000 by 750 to get a minimum of 8 square feet of attic ventilation. That translates to 3 foot by 3 foot attic ventilation, or two attic vents, each 1 ½ foot by 1 ½ foot. Those vents would provide you with 9 square feet of ventilation area, satisfying the need for ventilation. A general rule of thumb is that the minimum square feet of attic vents should be equal to the square foot area of the fan shutter hole in the ceiling.
Select the Whole House Fan That Meets Your Ventilation Needs. Fans are sold depending on the diameter or CFM of the air they move. For example, a typical 36-inch diameter whole-house fan will move 6900 CFM of air. A 30-inch fan will move 5,700 CFM.
A 24-inch fan will move 4,500 CFM. Overall, there's nothing wrong with buying a whole-house fan that's slightly larger than the minimum CFM you need. Attic ventilation is crucial for homeowners because attics can be like an oven on top of their home, heating their living space from above. QuietCool solar attic fan motor housings and covers are powder-coated and made of sturdy steel to last forever.
The more powerful the fan, the higher the CFM, allowing the fan to push a larger volume of air out of the attic space. To determine the size of the attic, multiply the width by the length of the attic floor and multiply the two. Attic ventilation keeps the attic cooler in summer and prevents ice buildups and moisture problems from forming during the winter months. Size is also something to consider, as most ceiling mounted attic fans can fit in a pre-cut hole in the ceiling, while others may require a new or larger hole to cut.
A high-quality attic fan helps regulate temperature and humidity levels while maintaining proper ventilation. There are a couple of different fan styles that homeowners can use to help control the temperature of the attic space. Before deciding to purchase an attic fan, it is necessary to inspect the attic to determine how well the space of the rest of the house is sealed. This attic fan is installed on a tile roof and uses the 36 watt solar panel to extract its energy from the sun.
The Broan 345SOWW is an excellent choice for those looking for an attic fan that can be easily installed and left in their own devices. Traditional attic fans often use less efficient motors and move less air, which means they are less efficient. This fan doesn't have any insulated doors that close when not in use, so warm air may enter the attic when you don't want it. QuietCool solar attic fans come with an electrically coated steel primary flashing that nicely and firmly seals the roof to protect it from the elements.