That s right your heating and air system is nothing more than a big circulation unit.
Can return vent for furnace be on floor.
Return air vent installation.
A return duct is the part of the system that carries the air back to the furnace or air handler where it will then be circulated back out through the supply vents.
This is one of the main reasons why some homeowners believe they can block air return vents with furniture.
Supply air from furnaces and air conditioners should be on outside walls.
The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room.
If the supply ducts are in the floor then the return air should be located up high.
You ll also notice these hot air return vents on the second floor of two story homes since hot air continually rises at the ceiling level in one story homes.
I m thinking that my ac would be more efficient if i closed off the return air and all registers in the bonus room and had the ac solely fed by the 20x30 vent on the main floor.
If you are in the far north or in the southern us the answer is simple.
For one more air vents make it easier to achieve neutral pressure in your home.
This pulls the air across your body.
Return vents on the other hand suck air in when the system is running and tend to get a lot dustier a lot faster.
Unlike supply vents return vents do not need to be cased in metal.
Return vents are usually larger than heat registers and can generally be found close to the ground or in the floor in older homes or on a wall close to a ceiling in newer homes.
The low vents stay closed in the summer and the high vents stay closed in the winter.
Either every room with a supply register will also have a return air vent or there can be centrally located return vents on each floor of your home.
If your supply vents are on the floor stuff can fall into them but when the system is running they push air out which tends to keep things like dust bunnies away.
Where one return vent serves an entire zone air space should be provided under doors so that when they are closed the registers can still draw air without pulling against the furnace which causes negative pressure in the home.
The problem comes when you use both heating and air conditioning.
They can be placed into staircase cavities stacked closets that run one on top of the other or in stud cavities in the wall.
Within the spring season you may have closed the bottom cold air return vents that forces the air come back to the furnace to be drawn from the ceiling wherever the air is the hottest.
Some systems have two sets of return vents one up high for warm air and one low to the floor for cool air.
Sometimes vents get blocked by rugs couches or the like.
In an air conditioning climate the return duct goes near the ceiling to draw off the hot air and cool it down.
You will not feel air being blown out of these vents as they are used to force out the cool air in the room to be reheated by the furnace.
In a heating climate the return duct goes near the floor to draw off the cold air and heat it up.
A return air venting system can be installed in one of two ways.
Try to avoid doing this to your vents as it will reduce their efficiency.