I have a half finished basement which seems to stay too cold during the winter. There is one supply register in the finished side of the basement, which is about 20x20. There is no return anywhere on this side.
Its been suggested that putting a return in would help because it should pull the cold air out and give the basement a better "mix" when the system is heating. Is this a good idea? Could I even go as far as adding a 3rd zone so that I have a second supply with an automatic damper (I have a 2 zone system right now and the panel can accept a third zone)?
Also, the unfinished side of the basement also has the one supply register, for the same amount of space (20x20). However, above it is a tile kitchen floor which is *always* cold during the winter. Any ideas how to improve the feeling of the floor? Would I need to insulate the unfinished side of the basement? I already made sure I have insulation at the sill plate, which helped a little but not enough to make the kitchen floor comfortable (not even talking bare feet..........even with socks on the floor is cold).
Thanks in advance!