Attic Furnace Enclosure

While the traditional spot to locate a residential furnace has been the basement there are many reasons why putting it in the attic is more convenient.

Attic furnace enclosure.

Attic furnaces save living space on main floors. 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. If you don t have a crawl space or a basement then it can be a challenge to place a furnace on the ground floor of the structure. A horizontal gas furnace installation in an attic should be on a service platform large enough to allow for proper clearances on all sides and service access to the front of the furnace see manufacturer s i o manual.

One reason that ac units go up in attics is because they re cheaper and easier to install. This puts the furnace in at least semi conditioned space. A furnace in the attic is a design that works for all homes. Attic installations save labor and cost less just like everything in life when it comes to home building money talks.

Elevate an enclosure in a basement or garage. If the furnace is a fuel burning one be sure you provide air for combustion. The door to the enclosure also has to be gasketed and the hwh must be some minimum distance above the floor of the garage. You might not receive the same air movement benefits if the unit is in a garage either.

Use concrete blocks or a concrete pad to set the base of the furnace at least 4 inches above the floor to prevent any water from reaching it. This is one reason building codes today require gas hwhs in garages to be in separate enclosures with combustion air supplied from outside the garage the attic above the garage is acceptable. You can build a small enclosure around the furnace with rigid foam insulation then pick up the insulation on the ceiling inside the enclosure. Attic furnaces are becoming more common in both residential and commercial buildings.

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