I want to frame some walls and hang drywall, is there some building
code that says how close you can build next to a furnace? I'm in
wisconsin if it's different from state to state, where can I look up
this information? What is a safe distance?
Building codes are local. Phone city hall, ask for building code
info. Some places have it on line.
That said, code doesn't often differ that much from place to place.
Here, Calgary AB, code is framing 24 inches from the front of the
furnace (to allow people to work on it.), six inches otherwise. One
inch clearance from B vent. Doorway into furnace room must be
The safe distance is code or better. Preferably better.
On Fri, 24 Feb 2006 20:20:31 GMT, email@example.com wrote:
24" on the front wont cut it. Next time you are bored to tears, go try
and slide out the blower assembly from your furnace/air handler. The
code is 30" to the front and thats also in the instructions of all the
furnaces. Keep in mind, that is MINIMUM. Try squeezing a 6'-3" 240lb
tech in that space with your blower assembly and you will see what Im
Question wasn't what was practical or desirable. Seems to me I also
said, better than code was desireable. OP Question was what
what code requirements are. My answer was check with the local city
hall. I cited what code is here. If code is thirty inches where
you are ... then so be it.
I have no interest in squeezing a six foot three, two hundred forty
pound tech in that space or anywhere else. <grin>
You're right, but some of the "other things" I had in mind were
air supply for the burner, outside air supply if needed,
positive/negative pressure control, stuff like that.
The furnace itself will have its own stated clearances which can
vary widely from zero clearance to 36", just for fire code, not
for service. My zero-clearance furnace requires as little as 4"
on the sides & nothing on top of the back, for spacing, but it
requires 3.5 square feet of air supply if I recall correctly, to
insure it never creates a negative room pressure for the burner.
The cold air returns and heat ducts are another issue in
themselves; we're discussing codes, not comfort, so they're not
incuded in my details here.
Basically you have to be certain that the burner can get
enough air that it never starves for oxygen, thus letting CO flow
into the room. And that of course DOES take into account where
it's pulling its cold air returns from. Usually it's most easily
solved by using a louvered door if the furnace is enclosed, and
locating it where there is an ability to pull in outside air if
it should need it (as most furnaces are specced for).
Electric heat of course is another entirely different animal
and much less complex in these areas, but the spacing
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