Air Ducts Between Floors

A return air duct is what carries air back to the furnace after it is dispensed throughout the home through the supply duct.

Air ducts between floors.

Area through this access hole. One of the upstairs closets has a hatch in the floor that lets us look in between the lower ceiling and the upper floor. Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as. If the supply ducts are in the floor then the return air should be located up high.

We have a 2 floor house built in 1978 in the dc area which is hot and very humid in the summer. Without a return air duct the air would not properly circulate and your energy costs would rise. The warm air will offset any cold air entering around the window and reduce condensation or frost on the window. Floor ducts placed below a window give better results.

Return air grille with a piece of sheet metal attached to the back of the grille that has been painted flat black. This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs. Hvac ductwork in floor slabs. Stud wall cavities and spaces between solid floor joists cannot be used as supply air plenums.

Return air ducts usually use ceiling joist spaces as the actual duct which then runs back toward the furnace. When the work is completed install a 14 in. This size fits just between most floor joists. The most common size duct used is 14 in.

We ve recently had a slight moldy smell and water on the 1st floor ceiling. Section r403 2 3 building cavities mandatory. Most installers report they can get to a 100 sq. Section r403 2 1 insulation prescriptive.

Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories. This pulls the air across your body. If the supply ducts are high or in the ceiling then the return air ducts or grills should be low on a wall. It turns out that the air conditioning ducts in that space are covered in condensation which is.

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