Yeah I actually just tried to measure it now for sh!ts and giggles but pretty much sittin at 0 with the warm weather and cooler house. Once we get a low near 50 and I have time maybe I’ll just light a bunch of scraps and get the stove warm enough to test. I didn’t really want to have 5 feet of pipe above the highest part of my roof but I guess it’s that or switch to a easier breathing stove. Is the princess a better drafting stove?It's tough because you're supposed to measure draft with a hot chimney but the ASS seems to come out with a cool chimney near the end of the burn or at low burn rates. I suppose you could measure the draft strength when the flue temps are low to see how they drop off and compare that with ASS events.