LsFarm wrote:Hi MP, welcome to the forum.
Your stove won't put out much heat without the fan running, the sides and front of the stove will radiate heat, but the back and top have the second layer of steel, making the air passageway for the fan, and without the fan washing the heat off of these areas, the stove's output will be a lot less.
Harman recommends a Barometric damper, set at around .05" wc. With your tall chimney, you probably have double or triple that amount of draft. Too much draft will pull a lot of heat out of the stove and up the chimney. The baro damper will control this excess draft and allow the stove to run warmer, use less coal, and give longer burn times.
A steady consistant draft will make the adjustment of your air inlet knob in the ashpan door much easier. this is because without a baro damper, one day with strong winds, cold temps, your draft will be much stronger than the next day with calm winds, and milder temps... So one day 3/4 of a turn open would be about right, the next day maybe 1-1/2 turn is needed to get the same burn time and temp output from the stove... with the draft consistant, the variables will be less, the settings much more consistant.
We have a manometer loaner program so you can borrow one of the traveling manometers, and set your baro accurately.
Hope this helps.. Greg L
Excellent information - thank you Greg. I've contacted my Harman dealer and will be picking up the draft regulator today. We are on top of a hill and have a 30+ mile view to the south. So when we get an east or south wind it can be very interesting up here! No problem with downdrafts, just mostly the wind making too much - so the regulator will surely stabilize the stove. THANK YOU!
I am also interested in the manometer loaner program so I can set this draft control to peak performance - that would be very much appreciated! Thank you for your helpfulness.
I've used coal before, in my first church with two potbelly stoves! That was an amazing experience with stoves that are not airtight! Big difference with the Harmon!