I heat 1800 SF, in a ranch home. It has a walkout basement where the pellet stove is located. I have a forced hot air duct pushing into the living room which is above an insulated garage on the other side of the walkout basement. The living rooom and kitchen run lengthwise above the insulated garage, then stairs go down from kitchen to the walk out basement where the pellet is. I also have an 18" header above the walkout stairs to trap hot air in the basement cieling area, so the fan can circulate it upstairs which is located inside the drop cieling in the basement. Its more or less trapped in the walkout cieling area,so the fan can push it upsrairs, then the cold air sinks and returns to the basement down the stairs. There are additional vents on the heated side of the house allowing the hot ait to cycle into the bedrooms and bath. You can see the draft in the stair in the winter with a match,and its a pretty good one,you can aslo feel it
We have electric baseboard as backup, which is set to 60 or so in the winter and doors shut, except the basement stair door. They do not cycle unless it gets down in the teens.Although we keep the bathroom warm in the winter. I cannot judge the bill as the house is fully run on electric being built in the late 60's when electric was king. Stove, HW heater,dryer and so on. But the pellet stove reduce the bill by 50% or better, as our first years where all electric...early 90's at 210 a month. Now we average 130-180 in winter.Most of that now is parasitic draw,computers,modems,charging type stuff,clocks,microwave, vacuums, TV's, stove clocks,etc.....
The p61 is 61k BTU and pellets are around 200-210 a ton in august,which is when I by the 5 ton before they go up with demand. I had done extensive research before I settled on the harmon, brass nd bronze gears. weld quality, and plate thickness where top of my list, as well as feedback.
Harman P61 - YouTube
TIP: I also use a razor blade on the glass to reomove heavy carbon as needed,during the winter to keep the viewing nice,but I noticed it stil had burned on carbon and I am not one that is big on elbow grease anymore. I put some driveway cleaner (AKA Muratic acid on a shop towel,and it wiped right off,now its part of my cleaning supplies.