How To Install Stove Exhaust Vent Through Cold Climate Roof

From up on the roof use a jigsaw or reciprocating saw to cut a 4 in.

How to install stove exhaust vent through cold climate roof.

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. 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. Leave the drill bit sticking through the roof so you can find the hole. Some passivhaus builders avoid the use of a range hood exhaust fan.

Here you see a very good roof top exhaust hood made by ventilation maximum in quebec where they tend to make roof vents taller to avoid being buried in the snow. Of duct just inside the termination point which is where condensation is most likely to happen. Try to keep it close to the fan location. Rise up into the eve vents of the house and back into the attic fig.

More frost cold drafts air sealing figure 1. 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. Be sure to extend the pipe up at least 2 to 3 above the roof to prevent snow buildup from causing problems. Yes you can vent a range hood through the roof using a 6 single wall pipe.

Instead they install a recirculating fan that includes a charcoal filter. On the outside you will see the wind baffle that prevents snow from blowing in. Keep the vent low and run the insulation over the duct. Start in the attic and drill a hole through the roof in the desired vent location.

Frost accumulation air sealing drip on outside reduced wall drafts.