This is what I want to do: I have oil fired forced hot air. I have a partially finished basement with a office and a den there. I also have a pellet stove on the main floor of the house as supplament heat. I would like to move the pellet stove into the basement and put a vent into the cold air return (it is in the basement ceiling) and have the furnace fan run on a lower speed to take the warm air from the basement and distribute it through the rest of the house.