Height of Horizontal Furnace in Crawlspace

Specific Inspection Topics Inspecting HVAC Systems
1

How high should horizontal furnace be installed off the floor of a crawlspace? Again THANKS !!! for all your help.

2

Very unusual to find one in Ok installed in a crawl seen perhaps two but an unusual crawl lots of head room. The AHJ in this area requires 6 inches of clearance for any air distribution component and or distribution ducting perhaps different for you.

3

Thanks! Very unusual in the part of the world also. House built in 1950.

4

Buck

In my area, a Horiz.furnace must be at least (8"-clear) above ground, and unless I have remembered incorrectly, must have 12" clearance above the casing, to any combustible material(s).
Crawl spaces are still a viable design for HomeBuilders in our area. Not as many as there use to be years ago, but still out there.

5

Thanks! Greg