Air Ducts Between Floors

We ve recently had a slight moldy smell and water on the 1st floor ceiling.

Air ducts between floors.

Free call from tim carter about your ducts click or tap here. One of the upstairs closets has a hatch in the floor that lets us look in between the lower ceiling and the upper floor. Area through this access hole. When the work is completed install a 14 in.

This size fits just between most floor joists. Stud wall cavities and spaces between solid floor joists cannot be used as supply air plenums. Section r403 2 1 insulation prescriptive. Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as.

It turns out that the air conditioning ducts in that space are covered in condensation which is. If the supply ducts are in the floor then the return air should be located up high. Return air ducts usually use ceiling joist spaces as the actual duct which then runs back toward the furnace. If the supply ducts are high or in the ceiling then the return air ducts or grills should be low on a wall.

The warm air will offset any cold air entering around the window and reduce condensation or frost on the window. A return air duct is what carries air back to the furnace after it is dispensed throughout the home through the supply duct. Return air grille with a piece of sheet metal attached to the back of the grille that has been painted flat black. This pulls the air across your body.

Floor ducts placed below a window give better results. Building framing cavities cannot be used as supply ducts or plenums. Hvac ductwork in floor slabs. We have a 2 floor house built in 1978 in the dc area which is hot and very humid in the summer.

Most installers report they can get to a 100 sq. Section m1601 1 1 above ground duct systems. Section r403 2 3 building cavities mandatory. This article describes heating and air conditioning ducts that have been placed in or beneath concrete floor slabs.

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.