Trying to get warm air from the half of my house where the stoves are to the other half were no stoves are. We have a single level, mid-century ranch about 2200 sq ft. Our kitchen, LR, family room, dining room is now 1 big room with a 15ft wide floor to cieling chimney/hearth. About 6 feet from one end of the chimney is the one door to the hall and bedrooms. After our remodel, I have original doors left over. My idea was to take an extra door and cut 2 rectangles, near the top and bottom and install fans/grates. The upper fan blowing into the hall/bedrooms and lower blowing out of the hall/bedrooms. In the summer I would swap the doors back.