Ductwork Between Floors

We have a 2 story home with an return air on the 2nd floor.

Ductwork between floors. Hello i just got a new hvac system replaced and it s a downflow system and it sits in the garage. Ductwork leak in between floors. 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. Now the problem is that there s basically really weak airflow on the 2nd floor but i was told that the new system should have enough power to push the.

Hvac air ducts located inside concrete slab floors invite a surprisingly broad range of building problems that fall into two broad categories. This size fits just between most floor joists. 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. Occasionally we need to access the ducts between the floors to improve the airflow.

The most common size duct used is 14 in. The fourth shows them in the attic sort of but below the building enclosure with some help from a special type of truss. Running a duct from the first floor to the second involves creating a hole in the main duct and attaching new duct work that terminates in a floor level heat register on the second floor. Run ductwork between floor joists whenever possible and anchor it in place with galvanized hanging straps.

Another method which isn t shown in that paper from nrel is to put the ducts in a conditioned crawl space as shown above. Functional troubles such as lack of air flow or collapsed ductwork and environmental problems such as. Hvac ductwork in floor slabs. Here are several ways to access ducts.