I just stopped at my pellet stove to order more pellets. They had two Harman stoves going on opposite sides of the not well insulated store. It's a pool store in the summer. I put my hand in front of the room fan tubes and it was warm. It had a pretty good fire going. I know my Whitfield Advantage III, when on heat #2 of 5 I can barely keep my hand in front of the room tubes. So I got a meat thermometer, and measured the air. Not contacting the tip to the stove tube, the interior fan was at #3 of 5 and showing 180 degrees. I'll assume my stove was putting out a lot more heat then the Harmans at basically the same settings ? I was wondering why they had two stoves going. It's not that big of a store.