I installed a pellet stove in my basement and am having trouble getting the heat to warm up the upstairs of my house. The basement (finished) is about 700 sq ft and the upstairs is about the same. The stove was rated for 1500 sq ft. When I have the stove on and get it to about 77 degrees downstairs I still do not feel anything coming up the vent into my upstairs living area. I have tried to use the central air fan to move the air but it actually seems to make the house colder and not bring that warm air up. Anyone have any sugguestions or help? thanks in advance