I purchased a new Harman SF-250 last week. This is an upgrade to the Harman Mark III I've been using for the last 3 winters. So far I 've found the SF-250 to be slightly more difficut to use but I am sure I will learn it's operating characterisics soon. It produces much more heat as it should. The firebox is huge! I am debating on whether I should purchase and install the heat accumulator and run stove pipe to a grate through the basement ceiling. I may have too much heat in the living area
The Mark III was slightly undersized to heat my entire home. I do not suspect I will have similar problems with this new unit.
While the Mark III has the classic look of a high quality coal stove, the SF-250 has more of the furnace look to it. But one can see the quality built into this unit. She is big & heavy. Now if only the temps wall fall back into the teens, I could really put her to the test
I'll post an image of the 250 soon. I also have the Mark III for sale. Intersted persons may locate it listed under the NEPA Index for appliances & stoves for sale. An image of the Mark III is also shown under the *pictures of your stove* thread. I have cleaned it up. It's actually looks much better now.