[Arkware]

Jim,
I have 4 of the round ducts coming from the heater. 1 goes to the rectangle floor duct (LR,Kit,BedRoom), 2 goes to the bathroom, 3 goes to the basement, and 4 goes onto the floor of the area between the basement and the stairs return vents. This last one is near the black & grey tanks and bathroom water & drains.
I am assuming HC has something like this, too....