How Much Attic Ventilation Is Enough

Attic ventilation keeps the air moving and stops mold from growing but too much ventilation can be just as bad as having none.

How much attic ventilation is enough.

That said air resistance and interference such as vent grates reduces the area of true ventilation. Use the right type of attic vent for the right project and roofing contractors can expect efficient performance and energy savings from the attic ventilation system. Choose one of the following products to meet the recommended intake nfva of 528 square inches. The following product options will allow you to achieve an intake nfva of 528 square inches.

Dangers of too much ventilation. Use the right type of attic vent for the right project and roofing contractors can expect. Jones takes this measurement and divides it by 150 for a total of 7 36 square feet of ventilation space that is needed. With a power switch or a thermostat installation an attic fan can be turned on to let hot air from the attic out.

Building codes typically require 1 square foot of venting space for every 150 square feet of attic space. 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. Ideally half the vents should be located in the soffit at the bottom of the roof and half in gable or ridge vents near the top to allow for natural circulation of air through the attic. But sometimes roofing professionals become frustrated because they re stuck in one of the following traps they d be wiser to avoid.

It features a sturdy galvanized housing and a 3 1 amp motor that provides ventilation for up to 1 600 square feet of attic space. This yields a total area of 1 104 square feet. The venting space should be equally divided between intake and outflow vents and the. Without exception you should talk to a professional to determine what your home requires.

The two main dangers associated with too much ventilation involve roof damage and increased utility. It also comes with a built in thermostat that you can set to. Ventsure inflow intake vent. A wind turbine catches the wind and spins a fan which pulls hot air outside.

Jones has an attic space that measures 23 feet by 48 feet. To keep air flowing your roof needs just the right amount of attic ventilation. The general rule of thumb on the amount of total attic vent space needed is to have at least one square foot of vent space for every 150 square feet of attic area. Allows cool dry air to enter the attic.