Attic Aiir Vent Neede

Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge.

Attic aiir vent neede. Without exception you should talk to a professional to determine what your home requires. 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. Attic air is an insulation company that specializes in evaluating your home to ensure that it is properly ventilated and insulated and the evaluation is free. This yields a total area of 1 104 square feet.

So if your attic is 1 500 sq. Federal housing authority recommends a minimum of at least 1 square foot of attic ventilation evenly split between intake and exhaust for every 300 square feet of attic floor space. Ft of attic space for example 20 x 50 to be effective. Jones has an attic space that measures 23 feet by 48 feet.

Intake vents located at the lowest part of the roof under the eaves allow cool. That said air resistance and interference such as vent grates reduces the area of true ventilation. Tips for assessing your needs. Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation.

The rule of thumb on the amount of vent space needed is approximately 1 sq. Choose one of the following products to meet the recommended intake nfva of 528 square inches. Ft you divide that by 150 to get 10 sq. To lower attic temperatures and to remove excess moisture.

Allows cool dry air to enter the attic. In a properly designed passive system air enters through the soffit. Since 1996 attic air has earned a reputation for providing effective solutions for your insulation and ventilation needs. Ideally there should also be plenty of soffit intake space their calculations recommend 336 net square inches of open soffit ventilation to supply 700 cfm.

Jones takes this measurement and divides it by 150 for a total of 7 36 square feet of ventilation space that is needed. Ventsure inflow intake vent. Of vent space for every 150 sq. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

The following product options will allow you to achieve an intake nfva of 528 square inches.