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chillz911 09-07-2010 11:55 AM

heat shield for wood furnace
Hi everyone,

I have a situation with my wood furnace, the pipe runs close to the corner ceiling of my basement wall. The insurance company has informed me that we should put a heat shield near anything that is 18"inches fo the pipe. The ceiling is 12 inches. Thus the section that would need to be covered is 2 feet by 2 feet or os.Any suggestions. I have googled to look for examples of this and canot find anything to help me. Is this a do it yourself project and how do i proceed....

There seems to be something in that same corner already i am not sure what it is it is looks like it is a substance that was sprayed, almost foam like but it is very hard and black. what do you think this is? i am thinking the previous owners may have used this as a heat shield but i cannot be sure what exacly it is... i will post a picture of it soon.

any feedback would be greatly apreaciated

fabrk8r 09-07-2010 12:36 PM

You could take the dimensions that you need the shield to conform to to a local sheet metal shop and have them cut a piece of light galvanized material to fit. 24 gauge or even 26 gauge material would work.

I would leave the galvanized unpainted as it will reflect the heat better than a dark surface.

yuri 09-07-2010 03:55 PM

Yep, and take some pictures to the shop with you so they can help you better.

beenthere 09-07-2010 05:42 PM

Yep. Just needs a 1" air gap between the sheet metal and wall then.

chillz911 09-07-2010 09:14 PM

if i need a one inch gap what do i need to fasten it to the wood?

here are some pics of the asbestos and the other stuff that i am not sure what it is exacly.

Should the sheet metal go on top of the furnace as well?

beenthere 09-07-2010 09:18 PM

They can make a flange for you to screw it fast.

rtoni 09-08-2010 09:38 AM

[quote=chillz911;497550]if i need a one inch gap what do i need to fasten it to the wood?

The suggestion for a flange on the sheetmetal sounds like the best way to go. FWIW, in addition to the good advice you already got here's some add'l thoughts...

My woodstove had the same problem (clearance from part of the black stovepipe to wood structure, and clearance from stove to adjoining walls) - I used a stove pipe heatshield product (bolts right to the pipe, as opposed to something on the wall, with 1" airspace at the pipe) - effectively turned that part of the pipe facing towards the structure into a double wall pipe - cut the required clearance in half. Cost @ $15 for an adjustable length (could cover about 4' of pipe if I recall) - 2 minutes to install. This was a vertical run so the product may not be suitable for a horizontal run - I don't recall - maybe others can sanity check?

On the walls behind / beside the stove itself I used some leftover durock board (1/4") but again just because I had it there and it was easy to hang in that spot, plus I didn't have any sheet metal there at the time. I scavenged a short piece of metal furring strip (more leftover parts) which was really easy to snip into a few short lengths and these made perfect mounting brackets to hang the shield- with better than 1" clearance off the wall. Also have seen people take an old piece of 1/2" copper pipe and cut a few pieces @ 1" long and just use these as spacers (screw right thru them) for heat shield on their woodstoves. Not sure if copper and galvanized is a good mix of metals, but works great with durock.

Anyway, the flange on sheet metal makes the most sense but just tossing some noise in here (I'm a scrounger so a spare parts solution is kinda where I go if I can...).

chillz911 09-10-2010 08:38 AM

does anyone have any idea of what the stuff in the picture is?

I called the inspector who did the WETT certification ,he hasnt called me back yet.He checked off that there was an 18" clearance all around the FLU pipe but there actually isnt.

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