Decking Under Attic Furnace

Not only will it interfere with the efficiency ratings of your equipment but it can also cause damage to your unit that may go undiscovered for some time.

Decking under attic furnace.

Mold growing on the sheathing in your attic is a serious problem that shouldn t be ignored. However since very few attics have an opening that s wide enough to pass a full sheet of plywood through the four by eight sheets should be ripped lengthwise. Verdict on having a furnace in the attic pros and cons. If your attic joists won t bear the weight necessary to finish out a living space but the engineer cleared them to support floor decking for light storage you can install inch plywood or.

The decking material can be half inch plywood. Be sure to cut the ripped pieces to the proper length before taking them up into the attic. High efficiency furnaces aren t usually recommended for an attic. There must be a passageway at least 30 inches high and 22 inches wide and not more than 20 feet in length.

Attic furnace passageway and service area electrical requirement. Look up at the roof area. I call it out when there is no decking on the passageway. Gain access to the attic to inspect the plywood or roof decking.

Does mold on attic sheathing have to be removed. Most of the issues that furnace might experience in an attic are due to extremely cold weather in this poorly insulated space. The following are attic furnace installation requirements based on 2009 irc and 2009 imc the codes refer to it as appliances in attics. Plywood around furnace air handler on attic retro now be honest hear how many of you guys when you replace the indoor unit dial it in with plywood around the unit not to sit on must be rated and sheetmetal under i suspend mine on trapeeze so the next guy doesnt have to roll in the itchy stuff.

Locate the rotted roof decking. Attic furnace access passageway and platform. Note bad areas for removal. Attic furnace installation must comply with you local mechanical code or imc international mechanical code if such was adopted in your area.

Decking in front of the hvac equipment must be at least 30x30 inches. A furnace can suffer from a drop in energy efficiency if it s in an unconditioned space such as an attic.