Hello, I am working on installing a Trolla 107a that's in good condition. I need to mount it so one side is facing the room and the other side is about 13" from the wall. Rather than mounting a huge heat shield one inch from the wall, can I bolt a smaller one to the stove? I would leave room for more than an inch of circulating air between the stove and the shield. I could make it large enough so there would still be metal between the stove and anything combustable within 36". I believe that the standard states a wall shield must be a at least one inch from the wall. Is there a maximum distance? Thanks for your thoughts.
Ok to make a heat shield for the stove rather than the wall?
- Thread starter Dmils
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I disagree with you bg. The code only says atleast 1". All it is doing is blocking direct radiant heat. It works just as well on the stove as it does on the wall. It is just the same as using a pipe sheild.
The clearances and construction options for a wall shield are clearly spelled out. Walls in a residence are of predictable construction. Can you show me a clearance reduction table for a shield on an unlisted appliance? How would one know if the requested 13" is safe or not?
A shield on a pipe reduces clearance 50%. By that logic on a stove it would be a reduction to 18". What rule applies here? Does it apply universally to all stoves? Typically adding a heat shield to the back of a stove does not create a 66% reduction. Look at tested stoves that have both options. For example this is from the Jotul 8. They tested with and without a rear shield and came up with a 36% reduction.
![[Hearth.com] Ok to make a heat shield for the stove rather than the wall?](https://www.hearth.com/talk/data/attachments/234/234347-99ed3bedc78ea366da285285a36afc60.jpg?hash=9qM6BFI-u8 "[Hearth.com] Ok to make a heat shield for the stove rather than the wall?")
A shield on a pipe reduces clearance 50%. By that logic on a stove it would be a reduction to 18". What rule applies here? Does it apply universally to all stoves? Typically adding a heat shield to the back of a stove does not create a 66% reduction. Look at tested stoves that have both options. For example this is from the Jotul 8. They tested with and without a rear shield and came up with a 36% reduction.
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Thanks to both of you. I can see it both ways. I had not thought of the comparison to the pipe shield, or to the tested stoves. Part of the difference may be that the stove shield would consist of less metal and therefore be less effective at blocking or distributing the heat. BG, I take your point that it's untested. With that in mind I've gone ahead and built a proper wall shield. Curious though, is there a formula for how much radiant heat a 24 gauge sheet of steel will reflect or transmit?
Yes, I'm sure there is, thermal conductivity of materials can be looked up. I suspect a shiny sheet of stainless steel would reflect the most heat.
https://www.engineeringtoolbox.com/thermal-conductivity-metals-d_858.html
https://www.engineeringtoolbox.com/thermal-conductivity-metals-d_858.html
dmils,
Use both a stove shield and a wall shield. Using both brings clearances for some Vermont Castings stove models below 12 inches. Also 24 gauge is often stated, but 29 gauge is adequate. Canadian regs require 29 gauge. I hear the Canadians burn a bit of wood. STJP
Use both a stove shield and a wall shield. Using both brings clearances for some Vermont Castings stove models below 12 inches. Also 24 gauge is often stated, but 29 gauge is adequate. Canadian regs require 29 gauge. I hear the Canadians burn a bit of wood. STJP
Note that in the US per M1306.2.3 2021 you cannot go below 12in rear clearance to combustibles on any wood burning stove, no matter how much protection you add.
I'm planning to install a Jotul Firelight 12 with 12in of rear clearance with 24 gauge sheet metal as a wall protector. If my AHJ approves I'll be bolting it to the back of the stove where the manufacturer provided one would attach with spacers to put it about 3 inches to the rear of the stove and therefore 9 inches from the wall. In reality it'll be more like 13-14 inches from the wall to the back of the stove. That complies with 2021 US code by my reading.
If I could find a Manufacturer Jotul Firelight 12 Rear Heat Shield I'd just buy and install that, but they don't seem to exist anymore and the threads about the F600 fitting all end without the OP coming back and confirming if it worked or not.
Old thread I know, but wanted to contribute since this forum's been helping me get my stove install plan together.
I'm planning to install a Jotul Firelight 12 with 12in of rear clearance with 24 gauge sheet metal as a wall protector. If my AHJ approves I'll be bolting it to the back of the stove where the manufacturer provided one would attach with spacers to put it about 3 inches to the rear of the stove and therefore 9 inches from the wall. In reality it'll be more like 13-14 inches from the wall to the back of the stove. That complies with 2021 US code by my reading.
If I could find a Manufacturer Jotul Firelight 12 Rear Heat Shield I'd just buy and install that, but they don't seem to exist anymore and the threads about the F600 fitting all end without the OP coming back and confirming if it worked or not.
Old thread I know, but wanted to contribute since this forum's been helping me get my stove install plan together.
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A lower than 12" clearance may be permissible in some cases where the manufacturer has paid the lab to document the reduced clearance using shielding. This shows up in the original VC stove clearance tables.
![[Hearth.com] Ok to make a heat shield for the stove rather than the wall?](https://www.hearth.com/talk/data/attachments/348/348949-b6f066ee481887eb91468bc4bbdbda99.jpg?hash=pIy2G0e_H2 "[Hearth.com] Ok to make a heat shield for the stove rather than the wall?")
Oh cool, so the rule I'm referencing must only apply when decreasing distance without the listed testing. Thanks for clarifying!
I found a F12 Rear Heat Shield in a local stove dealer a couple hours drive away! Thank goodness because I was quickly learning I'd have to block the almost whole dang window to comply with wall protection without it (or give up 6 more inches of my room).
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