Furnace Exhaust Pipe Insulation

Because the pipe gets hot building codes usually require 1 inch of clearance from metal flues 2 inches from masonry chimneys to any combustible material including insulation.

Furnace exhaust pipe insulation.

Insulating around a furnace exhaust pipe. Although fiberglass may not burn it can melt contribute to a fire and the speed at which it spreads. Foil backed fiberglass pipe wrap insulation 105 model sp42x 16 7 12. Duct board plenum kit r6 0 46 model 4dpk24x24x24 52 98.

In contrast modern high efficiency condensing furnaces exhaust much cooler gasses and need only plastic pipe materials such as pvc cpvc or abs for their exhaust vents some high efficiency furnaces also include a plastic pipe for intake area and all types. The plastic gas furnace intake pipe can be insulated but any insulation strategy must include a vapour barrier on the outside. The area were pipes are both see the sun and is a wind tunnel for a higher wind chill in the area. In this case the b vent was also dented on the side so i know the airspace around the double wall pipe was compromised.

Furnace flues require special sealing techniques. Also known as the induced draft fan this one has a fan that is located on the end of the pipe. It had about a 5 rise from the furnace to the charred area in the attic. Master flow 24 in.

Without this indoor air will permeate the insulation and condense internally against the pipe. Master flow 6 in. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. Now that you have safely sealed the air leaks around the furnace exhaust you can work on insulating your attic space.

Fiberglass insulation cannot just butt up to the vent pipe touching it. Approx 5 off the ground couple inches from wall of home coming through a boarded up use to be window 90. It will draw in air for the combustion and then expel the fume outside. This is another affordable option for the heating solution.

Ruud r95p 100k btu 95 efficiency furnace power vent exhaust and intake pipes routed to the outside side single digits f in average cold winter for approx 2 days to 2 weeks. The flue is the metal tubing that extends up from the top of your gas furnace or water heater that carries the carbon monoxide gas from the heating unit to your. How to insulate a metal flue pipe. Frost king 3 in.

Since the exhaust pipe is running on a sidewall the fan works together with the furnace.