How to supply air in 2 rooms through a single joists cavity

hvac

In my basement, I have a bathroom of 8'X5' and next to it there is kid space of 10'X15'
both sharing one wall. I don't have much space in ceiling to run 2 flex ducts in their own separate joists cavity.

Just above in the upstairs, have two bedrooms and one bath room which took almost entire ceiling space for plumbing/flex duct. so I have only one cavity left between 2 joists in the ceiling to supply air to both of these rooms/spaces.

But How ?

Thanksenter image description here

Best Answer

Without being there to visually see just what you have to work with is almost impossible. Try looking at an 8"X 6"X 6" WYE duct at Lowes, Home Depot, or on-line to see if that will solve your problem. Can't think of anything else without being there. Don't forget to add a return air grill mounted near the floor if you want to add heat to the game room.

One possibility would be to install a heat duct for the game room and a small electric wall heater for the bath room. A better drawing or even a picture or two would also be helpful.

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