We have an old house that happens to have forced air. Unfortunately, according to an HVAC tech it looks like there aren't sufficient return vents to add a compressor to our furnace.
I guess I'm confused why the heating system itself doesn't need as many return vents — seems like it wouldn't work without one? The tech identified just one return vent in the whole house — on the ground floor.
What options are there for adding return vents to a smaller home (around 1500 sq ft over 3 floors)? Where can I put them without having to build out my walls and sacrifice space.
Best Answer
You want a second return in the ceiling of the top floor for cooling. Otherwise, all the hot air will collect upstairs and you'll have a very difficult time cooling the space. Any air return I've ever seen, that goes between floors, involved a wall being built out. Usually it's hard to tell because it's the back side of a bathtub that looks like it's built out for the bathtub to fit, or a closet that's a bit narrower. You may get lucky and already have space for it behind one of your walls, but that would require looking over a detailed floor plan to see.