There must be a passageway at least 30 inches high and 22 inches wide and not more than 20 feet in length.
Attic furnace platform.
Install working platform not less than 30 in depth and width in front of the entire firebox side of the fau.
According to code a work platform at least 30 inches deep is required along the control side of any furnace that is installed in an attic so that workers can stand next to the furnace.
The biggest advantage of having an attic furnace is that it s a space saver.
Two of the contractors propose installing the new equipment on the floor like the original system was installed.
One proposes suspending the new furnace from the rafters.
International mechanical code 306 3 says for appliances in attics there needs to be a level 30 inch x 30 inch service platform in front of the unit.
You ll also free up a closet.
Horizontal furnaces shall be permitted to be installed in an attic furred.
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If the closet is next to one of the bathrooms as it often is this gives you a nice remodeling opportunity.
The inside equipment will be in the attic which is typical for this area.
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After researching a little.
The original equipment installed when the home was built was supported on the attic floor.
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You might not receive the same air movement benefits if the unit is in a garage either.
Nothing worse than a 150 degree attic furnace installation at the far end and a sheet metal cover on the work platform.
There s usually nothing up in an attic aside from some stored items so a furnace won t take up useful space.
Jfunderburk joe funderburk cmi july 5 2010 5 45pm 8.
Attic access may be reduced to 22 x 30 provided the largest piece of equipment can be removed through the opening.
The attic furnace passage way and level service area are not required if you have your attic furnace appliance installed in such way that it is serviceable through the attic access opening and it can be removed through that opening.
Upright furnaces shall be permitted to be installed in an attic furred or under floor space exceeding 5 feet 1524 mm in height provided the required listings and furnace and duct clearances are observed.
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Both companies wanted to put the furnace in the same space attic centrally located in the house as the old one to reuse all connections and ductwork r4 2 flex octopus.
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.