Hi epd...I have been heating 2200 sq ft. (basement and 1 floor above), with a hand fed in the basement. I blow heated air into my cool air return system of my oil furnace and it works very well until around January then I must lite the stove in my livingroom fireplace. my brick ranch has NO insulation in the walls just cinder blocks, bricks on the exterior and sheet rock on the interior.
I have a very large old house (7000 sq ft) that I mostly heat with warm air from the basement. It started out as a first step on the way to hydronics but it now works so well that I am set and very happy so don't you get discouraged by the hydronics only crowd.
My home is probably bigger and even more split up so the first step is understanding your floor plan, size and location. Warm air is harder to move around than hot water but it usually can be done. It's a lot less expensive, cheap to run and much less complex. I can detail my layout but that would not be helpful as yours is probably way different. Here is a real fun part. The front part of the house three (3 floors) is heated by convection only via a double heater system. Just for kicks I offer this pic. What could be more beautiful? The back pipe is being made in copper as I write. William Sherrick (a board savant in old stoves) has been here and was blown away. All done with no water or even electricity. I have a video of him talking about it that I must edit and get published. Don't get discouraged. I hear you brother. I can even heat this giant with no power on but it is more work. Electricity is just a convenience. Many board members have tried to get me committed but I have a good attorney.
The wing with William in the photo is heated by a Wings Best BB stove. However, a $100 Jotul 507B that I have in the tractor shed would do just fine as well. -20* --- no problem --- mother nature, bring me your worst.