Originally posted by jasonwiest
I know you had mentioned that it's a bad idea to run the duct through the cold air return. Why would that be bad? Is it because it will make the forced air too cold? You had also said that "That duct will not make a difference in your basement anyway" What do you mean by that? In my basement, I am pulling 5 branch ducts to supply heating to the basement, but running them from the main branch, across the ceiling, and down the walls to the floor. (So that the warm air will come off of the floor, and not the ceiling) It's just that the one joist has that return that I would like to pass through.