How To Install Stove Exhaust Vent Through Cold Climate Roof

Be sure to extend the pipe up at least 2 to 3 above the roof to prevent snow buildup from causing problems.

How to install stove exhaust vent through cold climate roof. Frost accumulation air sealing drip on outside reduced wall drafts. Instead they install a recirculating fan that includes a charcoal filter. Keep the vent low and run the insulation over the duct. This approach works best if there is an exhaust grille in the kitchen ceiling far from the range connected to the exhaust port of an hrv.

More frost cold drafts air sealing figure 1. Best practice is to wrap the entire duct with r 3 to r 8 insulation but if nothing else you should at least wrap the 6 ft. Use a proper roof top exhaust hood if you must go through the roof. Leave the drill bit sticking through the roof so you can find the hole.

Attempts to insulate the exhaust duct for fans vented through a cold attic and the roof resulted in more frost forming on the exterior portion of the ducting. From up on the roof use a jigsaw or reciprocating saw to cut a 4 in. You can buy the proper flashing to install it on a flat roof and a roof cap that has screen around it to prevent insects from entering. Start in the attic and drill a hole through the roof in the desired vent location.

Rise up into the eve vents of the house and back into the attic fig. Try to keep it close to the fan location. On the outside you will see the wind baffle that prevents snow from blowing in. Yes you can vent a range hood through the roof using a 6 single wall pipe.

Of duct just inside the termination point which is where condensation is most likely to happen.