Re: Add a Cold Air Return?
I agree with some of what was posted.
Adding a retrun down on the lower level may help.
I would suspect that the heat vents are on the ceilings if so then you would place the returns down toward the floor.
This will draw the cooler air from the floor level and help with trying to circulate the heated air better.
Otherwise, if the returns were also on the ceiling the warm air from the supplies would be sucked into the returns.
Sounds like there should be an evaluation done by a HVAC company to properly balance out the system.
That is the intended flow charcteristic in forced air systems.
you must remember that returns do not acually "suck" the air from spaces--a return is actually only a path for the relief of pressure that is created by the "push" of the supplies.
However , I'll disagree in that the return does indeed "suck " ( draw in ) air in.
That's the configuration of a blower -- inlet sucks ( draws ) in air --- outlet exhausts or pushes air.
In a case of a return that's larger than the supply will actually create a negative pressure because it draws more air out than is being supplied ---- unbalanced.
"" an ounce of perception -- a pound of obscure "