The best location of the return vents depends on whether the system is heating or cooling the air.
Central heating air vent location.
The low vents stay closed in the summer and the high vents stay closed in the winter.
Unlike supply vents return vents do not need to be cased in metal.
Re best location of airbottle vent in central heating system i have a potterton boiler 60e connected to megaflow in the loft with bottled airvent in the flow and also in the return pipe in the loft near the megaflow tank the boiler is located on the ground floor in the garage with grundig pump.
Ducts should always be located within the conditioned envelope of the building ideally within the framing of floors ceilings and walls and they should be maintained so air does not leak out of.
For the best energy efficiency what is the optimum place to put the vents in each room for the new a c forced heating system ceiling high on the wall.
Sometimes vents get blocked by rugs couches or the like.
If it s cooling the return vents should be near the ceiling where the warm air collects but if.
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Place your cold air return vents on the inside walls of buildings at the lowest point.
Try to avoid doing this to your vents as it will reduce their efficiency.
The supply vents which push air through the duct work must be placed properly.
Many have duct work in crawlspaces so the registers are placed in the floor.
Attic systems may use registers placed in the ceiling instead.
The return vent pulls cold air from the bottom of the room and returns it to the furnace to be reheated and returned as warm air.