Furnace Exhaust Pipe Insulation

Insulating around a furnace exhaust pipe.

Furnace exhaust pipe insulation.

The gas furnace was in a garage and the flue pipe went up through the above attic. It had about a 5 rise from the furnace to the charred area in the attic. Also known as the induced draft fan this one has a fan that is located on the end of the pipe. Although fiberglass may not burn it can melt contribute to a fire and the speed at which it spreads.

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. Frost king 3 in. It will draw in air for the combustion and then expel the fume outside. Dia r 6 ductwork insulation sleeve 127 model inslv6 10 32.

Approx 5 off the ground couple inches from wall of home coming through a boarded up use to be window 90. 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. Fiberglass insulation cannot just butt up to the vent pipe touching it.

Now that you have safely sealed the air leaks around the furnace exhaust you can work on insulating your attic space. Since the exhaust pipe is running on a sidewall the fan works together with the furnace. Duct board plenum kit r6 0 46 model 4dpk24x24x24 52 98. Without this indoor air will permeate the insulation and condense internally against the pipe.

This is another affordable option for the heating solution. Master flow 6 in. 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. The plastic gas furnace intake pipe can be insulated but any insulation strategy must include a vapour barrier on the outside.

Master flow 24 in. 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 flues require special sealing techniques. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic.

How to insulate a metal flue pipe.