I have a 1300sqft ranch with a 1100sqft basement. Block walls non-finished basement, DS1600 stove is at one end of basement and stairway is at oposite end with upstairs door open. Heat raises to end of house with stairway open, but does not make it back towards 2/3rds of living space. Three bedrooms are at other end of house, my wife and my bedroom gets heated at end of house because stove is directley underneath of us, but does not reach 2 other bedrooms. I just installed a cold air return in farthest corner of coldest bedroom (corner of house). I ran a a cold air return pipe to basement (6in off floor). I could feel a slight pull and a lighter varified it. Tried that for 2 days, no better. I then installed an inline 6in fan, that really pulled the cold air to basement, but with no difference in heat in that room!
For the past 2 nights I removed pipe going to basement and installed fan at floor forcing hot air from basement to bed room. It has not been that cold out, but it does seem to blow warm air into room and temps have gone up well in bedroom. Of course now it sounds like an aircraft is landing in bedroom
This did help, but it still dose not get heat out of basement and into living area/bedrooms as needed. We are still getting a 5-7deg. temp differnce at house ends.
PS- I have hardwood floors so before cutting, I am trying to make right moves