Venting Kitchen Exhaust Fan Through Roof

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

Venting kitchen exhaust fan through roof.

Also be sure to place your kitchen vent at least 5 feet upwards from the eaves of the roof. Vent your bath and kitchen exhaust fans through the roof through a special roof hood. If it sits on an inside wall venting through the attic and out is a better option but if it is on an outside wall it is more practical to vent through the wall. That is five feet upwards along the slope of the roof and away from the bottom edge.

The duct for your exhaust fan needs to be run to the outside of the house to remove the chance of a fire hazard. Yes you can vent a range hood through the roof using a 6 single wall pipe. In either case do not vent into the wall or the attic. 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.

But the rule of thumb is to route it the shortest and straightest path to daylight. Venting through a roof vent or exhausting them in the attic could cause moisture problems and rot. If you want to replace the range hood and exhaust fan above your stove and vent it to the outside and the stove is against an interior wall you have several options. Use a proper roof top exhaust hood if you must go through the roof.