Relocating Floor Duct to Wall Duct
HVAC ducting question from Ohio, zone 5A. We are relocating a floor baseboard defuser with a wall register in the same wall. The baseboard defuser is fed with a 2-1/4 x 14 x 5 (or 6) in. Galvanized Steel 90-Degree Round Register Boot. The wall is an interior, 2×6 wall.
We were going to replace it with a 10 in. x 3-1/4 in. to 5 (or 6) in. 90-Degree Stack Boot, create a small 3.25″ x 10″ stack duct and use a 3-1/4 in. x 10 in. Short Way 90 Degree Rectangular Elbow to feed a 10″x4″ wall register. The new wall register will be 6″ from the floor, quite close to the original baseboard defuser. It is a small bathroom and we are trying to get rid of this floor obstacle.
The attached PDF shows the parts we were planning on using (assuming its a 6″ duct – we will figure that out when we open the ceiling below).
(1) Are stack ducts allowed in code?
(2) The stack duct should not be in direct contact with drywall, right?
(3) Does code require that the stack duct be insulated?
(4) If so, what is the recommended way of insulating stack ducts such as this?
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