Insulation Around Attic Furnace

It also keeps the heat out of the home or duct.

Insulation around attic furnace.

This creates a dam around the flue that prevents insulation from. Although fiberglass may not burn it can melt contribute to a fire and the speed at which it spreads. Insulation isn t only about keeping heat in. In either cse it fills the required open air space around the b vent in the un conditioned attic space.

Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Wrap the flashing around the flue and staple it to the flashing inside the ceiling joists through the notches on the bottom edge. The b vent system requires air space clearance as well as clearance from combustibles. Most often the attic is sealed by installing spray foam insulation at the roofline thus bringing the attic inside the building enclosure and turning it into conditioned space directly or indirectly.

Insulating around a furnace exhaust pipe now that you have safely sealed the air leaks around the furnace exhaust you can work on insulating your attic space. For diy attic insulation you ve got two choices. If you re really concerned you can also build a small insulated room around your unit to prevent heating and cooling loss. You can build a small enclosure around the furnace with rigid foam insulation then pick up the insulation on the ceiling inside the enclosure.

Heating cooling a while back i wrote about the incompatibility of putting an atmospheric combustion furnace in a sealed attic. You need insulation even around your ducts no matter where you live. Or you may even consider converting your attic to a finished conditioned space that will open up some room in your home too. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space.

High efficiency furnaces aren t usually recommended for an attic. Loose fill or batt the common term for blanket insulation. Both can be added to uninsulated attics or layered over existing material. This puts the furnace in at least semi conditioned space.

Fiberglass insulation cannot just butt up to the vent pipe touching it. If the furnace is a fuel burning one be sure you provide air for combustion.