Ductwork Between Floor And Ceiling

Since heat dispersed from ceiling ducts reaches the upper air first the hvac system has to work harder to push the heat lower into a room.

Ductwork between floor and ceiling.

Homeowners expanding their existing first floor duct work to the second floor need more space than walls typically provide so they must cut a hole in the floor and pass the duct up through the first floor ceiling. Required duct sizes using acca manual d acca 2009 must be calculated. Occasionally we need to access the ducts between the floors to improve the airflow. The warm air will offset any cold air entering around the window and reduce.

We have a 2 floor house built in 1978 in the dc area which is hot and very humid in the summer. The insulation you use to wrap your ducts should leave no gaps and be at least two inches thick to work effectively at reducing or eliminating condensation on ductwork. Add a false return grille cut an access hole in the ceiling of the first floor in a central area to gain access to the ducts. Neither is better per se.

No air should be able to penetrate the ductwork and the joints are a natural weak point. Map out your duct path to upper floors before you start cutting any holes. If a basement is present the furnace is usually installed there. We ve recently had a slight moldy smell and water on the 1st floor ceiling.

It turns out that the air conditioning ducts in that space are covered in condensation which is. Shorter ducts are generally. Floor joist cavities dropped ceiling soffits or other building cavities that will be used as duct chases should be indicated. Is there even a difference between hvac supply registers grilles in the floor or the ceiling.

One of the upstairs closets has a hatch in the floor that lets us look in between the lower ceiling and the upper floor. Floor ducts placed below a window give better results. Which is better hvac supply registers grilles in the floor or the ceiling. Ducts should be able to run between studs in the wall and then turn into a joist bay the space between two joists.

Ductwork serving floor ducts usually passes through the basement or crawlspace. Air from the attic basement or crawlspace can leak in or out where the ducts connect to the boot. The optimal placement of hvac supply registers in your home or building depends upon the building s design and your unique comfort needs. Spans of ductwork from a basement furnace to floor ducts are more direct and shorter versus ceiling ducts.

Boxing in the new exposed duct with studs and drywall subtracts living space but conceals the improvement. Connections between grilles registers and ducts at ceilings floors or knee walls typically leak where the boot does not seal tightly to the grille or gypsum board. Ceiling ducts are more visible than floor ducts and harder to camouflage. The most common size duct used is 14 in.

The cavity spaces must be free of obstructions and large enough to hold the duct plus insulation. This size fits just between most floor joists.