Air Ducts Between Floors

Section m1601 1 1 above ground duct systems.

Air ducts between floors.

This size fits just between most floor joists. If the supply ducts are in the floor then the return air should be located up high. When the work is completed install a 14 in. Without a return air duct the air would not properly circulate and your energy costs would rise.

Floor ducts placed below a window give better results. We have a 2 floor house built in 1978 in the dc area which is hot and very humid in the summer. This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs. Area through this access hole.

Return air ducts usually use ceiling joist spaces as the actual duct which then runs back toward the furnace. It turns out that the air conditioning ducts in that space are covered in condensation which is. Free call from tim carter about your ducts click or tap here. Most installers report they can get to a 100 sq.

A return air duct is what carries air back to the furnace after it is dispensed throughout the home through the supply duct. We ve recently had a slight moldy smell and water on the 1st floor ceiling. Return air grille with a piece of sheet metal attached to the back of the grille that has been painted flat black. If the supply ducts are high or in the ceiling then the return air ducts or grills should be low on a wall.

Section r403 2 1 insulation prescriptive. The warm air will offset any cold air entering around the window and reduce condensation or frost on the window. Building framing cavities cannot be used as supply ducts or plenums. Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as.

Stud wall cavities and spaces between solid floor joists cannot be used as supply air plenums. The opposite is true for ceiling ducts which should be placed as far away from windows as possible so that heat warms the room and not the window. Hvac ductwork in floor slabs. Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories.

The most common size duct used is 14 in.