Ideal flue and chimney temps.

[Lifted4x4Astro]

I posted my US Stove 1537G add-on wood furnace installation here.

I also installed a Honeywell UDC 2300 controller along with 2 "J" type thermocouples. One is sitting about 10" down from the top of the chimney. The other is in the flue pipe about 5' from the furnace.

Here is my flue pipe...

Here is where I put the probe. I put it here because I remove the single wall flue pipe for cleaning several times a season and did not want to have to mess with removing the probe.

Here is a little fire I have going. I was burning quite a bit more earlier today to get the house warm. This is the last fire for the night.

Cont'd....

 

[Lifted4x4Astro]

Here are the temps I see...

What are the ideal temps we are looking for in a setup like this? The manual only talks of over firing but does not state what temps max I should see. Earlier today I was seeing about 380/280. I see lots of posts (searched) that talk about running flue temps upwards of 700 degrees. Is that what my single wall 6" pipe will handle?

 

[begreen]

Moved to the boiler room for better feedback.

Nice monitoring setup. As long as the chimney temp is above 250 I think you are good. The single wall near the oil line bothers me a bit, as does it's proximity to the floor joists above, even with the metal shield.

 

[Lifted4x4Astro]

Thanks for moving it.

I modified the heat shields today. I pulled them down and added some fiberfax insulation between the heat shields and floor joists. When the flue was around 400 earlier today, the insulation was at room air temp. I have been keeping the flue above 250 and will continue to do so!

 

[pybyr]

chimeys, like other things we all fool with 'round here, depend on "delta T" to keep the combustion byproducts rising, and condensation (which'd wreck your flue) not happening. Avoid, very strenuouosly, any situation in which any flue gas products, not only water can condense in your metal pipe or masonry chimney