oliver power wrote: By now you know the HITZER 50-93 does not have an air wash. Even a weak drafting chimney has to pull air up through the grates. This allows the HITZER to burn during higher outside temps. So, as long as you have draft, the 50-93 will burn. However, the Harman Mark series stoves do have an air wash above the grates. Your buddies may have a hard time burning coal in warmer temps, as a weak draft is most likely pulling the air from the air wash, instead of up through the grates. Just something to think about. By the way, how's that 50-93 doing for you? Oliver
The 50-93 is doing great, especially so since installing the Baro. Every 50-93 might not need a barometric damper but with the draft I have mine is certainly working much, much better with one. It wasn't unusual to see the draft creep up to .2 or higher with the MPD closed on really cold days with no wind. Typically it ran in the .1-.15 range with the MPD closed but would drop down lower as the stove idled back down. 15° this morning & the draft was .065-.07 with the rear air damper open about .5" & the stove in the 450° range. Flue temps measured 8" out from the stove just before the baro run 120° at idle & about 180° when the rear damper is drawing air & the fire is roaring. Before adding the baro I would have seen 360° to 400° flue temps when the stove was pulling air. Now the heat is staying in the stove heating the room instead of being dragged up the chimney. House is warmer & I'm using less coal. What's not to like.
Oliver you are absolutely right about being able to burn coal in my stove at warmer temps. I had a few wood fires in early October but wasn't really thrilled with the Hitzer as a woodstove after years of burning in Jotuls. For the hell of it I tried starting a coal fire in mid October & while it was slow to take off, once started I was able to keep it going even when temps hit 60° to 65° during the day. Being a newbie I did screw up a couple times the first month, losing the fire, but that was due to my own mistakes. It will be interesting to see how long I can keep it going come Spring. I mounted the baro in a 6" tee & bought a cap so when I do want/need to burn wood I can just pull it out & plug the hole.