Attic Vent Chute Requirements

Theinternational building code 2012 edition ibc 2012 requires enclosed attics and enclosed rafter spaces formed where ceilings are applied directly to the underside of roof framing to have cross ventilation for each separate space.

Attic vent chute requirements. It can be cut to fit most joist spaces and is an affordable way to meet energy code requirements for air flow. Ventsure inflow intake vent. The following product options will allow you to achieve an intake nfva of 528 square inches. 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.

This is where you will be able to see what is actually going on there as far as airflow and condensation. Typically made from polyvinyl chloride rigid foam board or cardboard they can be installed with a few. Baffles are also called wind baffles venting chutes rafter vents or insulation baffles. Choose one of the following products to meet the recommended intake nfva of 528 square inches.

Without exception you should talk to a professional to determine what your home requires. That said air resistance and interference such as vent grates reduces the area of true ventilation. It is compatible with 3 or 4 ductwork and includes a 3 to 4 adapter for convenience. Allows cool dry air to enter the attic.

The rvk1a steel roof cap kit is an the rvk1a steel roof cap kit is an easy to install vent for ventilation fans bath rec room home gym etc. If you live in a cold climate checking the attic during the winter will help you make a better determination. 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. For improved air circulation in the attic install the durovent 22 in.

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. The net free vent area nfva shall not be less than 1 150 of the area of the space being vented. Most typical attic vent chute sizes are 16 and 24 to match open space between the roof framing members. The majority of the requirements related to attic ventilation have not changed much from the previous editions.

The following are the requirements taken directly from the irc. The ventilation amount and opening size requirements can be found in section 806 roof ventilation of chapter 8 roof ceiling construction. Attic inspection required the only way to determine whether you need attic vent chutes is to make a journey into the attic.