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.

Master flow 6 in. In this case the b vent was also dented on the side so i know the airspace around the double wall pipe was compromised. Insulating around a furnace exhaust pipe. It had about a 5 rise from the furnace to the charred area in the attic.

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 gas furnace was in a garage and the flue pipe went up through the above attic. Foil backed fiberglass pipe wrap insulation 105 model sp42x 16 7 12. Since the exhaust pipe is running on a sidewall the fan works together with the furnace.

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. Traditional gas fired forced air furnaces produce hot combustion exhaust gasses and therefore need metal vent pipes or chimneys. Duct board plenum kit r6 0 46 model 4dpk24x24x24 52 98. 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.

This is another affordable option for the heating solution. Fiberglass insulation cannot just butt up to the vent pipe touching it. Also known as the induced draft fan this one has a fan that is located on the end of the pipe. The area were pipes are both see the sun and is a wind tunnel for a higher wind chill in the area.

Master flow 24 in. The opening around a furnace or water heater flue or chimney can be a major source of warm air moving in the attic. It will draw in air for the combustion and then expel the fume outside. Now that you have safely sealed the air leaks around the furnace exhaust you can work on insulating your attic space.

Without this indoor air will permeate the insulation and condense internally against the pipe. The plastic gas furnace intake pipe can be insulated but any insulation strategy must include a vapour barrier on the outside. How to insulate a metal flue pipe. Approx 5 off the ground couple inches from wall of home coming through a boarded up use to be window 90.

Furnace flues require special sealing techniques.