Mastiffman wrote:Where is everybody taking their readings? Right now I have a magnetic Rutland gauge on my Harman Mark II's stack about 12" above the stove, which is 1/2 way to the barometric damper.
It's 32 outside, and my 6" stack goes up maybe 6' before turning then 2' into a, 8X8" brick chimney that is probably about 30' tall.
The stove is burning good, approx. 3/4 full of pea, with 2-3" dancing blue flames over 80% orange coals. Circualting blower is off.
Moving the magnetic guage around, the temps are:
Side of stove near the top - 490
Stack 12" above stove - 280
Stack 12" above barometric damper - 155
The only ballpark numbers I could find online are from Hearth.com's Q&A where they say a coal stove at 450-475 degrees should have a stack temp of 225-250, but where do they take those readings?
I think I'm probably running a little on the hot side, so I'm going to cut the air back 1/4 turn for now.
Any thoughts or suggestions?
My Harman is currently running at 225 degrees stack temp. The gauge is on the vertical pipe between the outlet and the tee where the baro is. My draft is running at -.06 WC, the chimney is about 30' tall, masonry, on the outside of the house. Draft vent is open 2 turns, stove 3/4 full of pea coal. At 1 turn it runs about 150 degrees. Before I installed the baro the pipe temps were much higher, the paint on pipes would start to smoke and I would get a combustion odor, I think the pipe connections expanded so much that the seams opened up a little.
29 degrees outside now.