Venting Furnace Through Metal Roof

The other option of course is a vented attic which requires an equal balance of intake and exhaust vents.

Venting furnace through metal roof.

If your furnace has an afue rating below 90 percent it will most likely have a flue pipe that goes up through your roof. Run the vent pipe up through the roof and install a metal or pvc flashing collar over it. If there is no sub roof to support the metal roof consider installing slatted vents just under the eaves instead of on the roof. So which type of venting system should your furnace have.

Metal roofing works well with this because the metal is unaffected by heat not being able to pass through it and enter the attic. Should my furnace flue pipe go through the roof or the side of the house. That s because the combustion byproducts are in a gaseous form so the gases can float up through the flue pipe and out of your roof. First you ll partially block your roof vent with the piping reducing the flow of cooling air through your attic.

That depends on whether you have a standard efficiency or a high efficiency furnace. Should you vent a metal roof. The water will condense and drip into the insulation below and perhaps into the house. In this video i cover installing a roof boot for a vent pipe in a metal roof.

Match the vent pipe to the furnace maker s recommendations either sheet metal or vinyl. Second during cold winters you ll be blowing warm moist air onto a cold surface the roof vent and roof plywood.