Aav Vent In Attic

Used most commonly at an island sink or vanity the vents are also located in the attic to prevent the roof penetrations as seen above on the front roof line elevation.

Aav vent in attic. Aavs should be installed indoors whenever possible. 01 09 2014 06 30 pm 3. Some areas do not permit them even though they are approved per the irc. The attic has certain conditions that can affect the aav performance which should be considered before choosing this as a location.

When an aav is installed in an attic make sure that it s at least 6 inches above insulation any less and there s a good chance insulation will be drawn into the unit severely affecting performance. You can use bends on the vent line and an aav in the attic as long as you also have one through the roof for the home. A vent through the roof is forever. Some authorities recommend air admittance valves on kitchen island fixtures to reduce the risk of horizontal vent lines becoming obstructed.

Depends on local codes. The irc allows them on a waste stack that terminates in an attic as long as the aav is 6 inches above the insulation. Aavs in attics should be at least six inches above the attic insulation. The temperature ranges that the sure vent will operate in are 40 f to 150 f your attic can experience drastic temperature variations depending on how it is vented and your geographic location.