I have a bathroom I'm remodeling, and the current heat vent is attached to a meandering ~10' run of round duct which originates from the trunk of the furnace (located next to this bathroom in the laundry room). The vent needs to be removed because of a change I'm making to cabinets. Can I attach the new vent directly to the supply trunk (which runs right above this room), or is it important that I provide a run of round duct for some reason?
The bathroom is small (6'x11'?), and with the furnace nearby, I imagine putting a supply vent directly onto the supply trunk could result in a lot of hot air coming in due to pressure. Can I solve that by using a small vent?