I'm so glad that I clicked on the Summer Project thread! I too have a Harman MkII. I love the thing! I plumbed it into my fireplace 3 years ago. 84 in the family room all winter, 74 down the hall way, and 68 in the bedrooms on the first floor. It does get a might cold, low 60's in the basement. I have a 1600 sq. ft. ranch with a 900 sq. ft partially finished basement. Since my daughter is back living with us in the basement, I have had to turn the oil burner back on. It worked well in conjunction with the stove, but when I filled my fuel tank, It was 750.00. That is more than I normally spend all winter on coal! It just disgusts me!
So, I decided to try a stupid experiment for next winter
. I am going to disconnect and push my oil burner out of the way, and put my MkII in its place in the basement under the duct work. I was going to box the stove's blower into the cold air return to pull the cold air down into the basement. I was trying to decide if I should then let gravity work at putting the heat up thru the plenum. After thinking about that for a while, I decided it would probably work better by installing a fan and filters into the plenum in order assist gravity with heating the whole house. My goal is to make the MkII the primary source of heat for the whole house, and kiss the fuel oil companies good bye!
Any thoughts, recommendations, or criticisms are GREATLY appreciated. I think my theory is sound.