I have a 10-year old house and the furnace / AC unit for the 2nd story was set in the attic. There is no special housing or room built around the furnace and the heat lost in the process of heating the upstairs invariably causes ice dams every year. I'm considering either moving the furnace to a basement area or building a small room around the furnace to help contain the heat that naturally gets lost in the process. Can you give me some pros and cons to either approach? Will building a room around the furnace be any better at containing heat loss and preventing ice dams? Also, a concerning issue is that the dryer vents through the attic to the outside. That duct came loose once and and I've noticed a lot of lint in the attic, which clearly concerns me too. An open furnace around lint just isn't a good idea. Your thoughts on relocating versus enclosing the furnace? Thanks a ton!