Proper Attic Ventilation In South Florida

Power ventilators also known as pavs are roof and gable mounted and they have electric motors that turn large fans to.

Proper attic ventilation in south florida.

Typically current best home building practices indicate an r 30 to r 38 for attic insulation. Grab a flashlight and inspect your attic during the winter. It s just like dressing to go out in antarctica if you have the right clothes you don t feel the cold or heat. If a home is well insulated and air sealed high temperatures don t really matter.

As the florida study found attic ventilation only made about a 10 degree difference to attic temperature maximum. That said air resistance and interference such as vent grates reduces the area of true ventilation. Rm 1600 the rm 1600 attic fan generates maximum power to battle built up heat and moisture in your attic. I come across many homes that originally had soffit venting and wind turbines at the peak but continuous ridge venting was added later during a re roof.

For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. A home with a roof vent. Climate zone 1 consists of the following south florida counties. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

In much of florida it is not uncommon to have an outdoor air dew point of 24 c 75 f and an attic air dew point of 29 c 85 f. Intake vents allow air outside to enter attics and other areas of ventilation. 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. Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic.

Broward collier hendry lee miami dade monroe and palm beach and require a minimum r 30 attic insulation. The florida building code identifies two distinct climate zones. Air flows in through the soffit vents and out through the roof vents. It s the ideal solar powered ventilation solution for large attic spaces and extreme climates.

They can be found on a roof along the lowest eave or near soffits. If you see dampness or frost you need better roof ventilation and some attic vents. I suspect the thinking was the more the better. There are two types of roof vents namely intake vents and exhaust vents.

In other words the entire vent opening doesn t count as vented space. Box vents are installed over a hole cut out of the roof and utilize natural convection to create an opening for the. Soffit vents are typically made of pvc or aluminum and. Tax credits for solar star attic fans.