I have a Bryant HVAC unit in my 1996 unfinished basement. There is a threaded hole in the front of the unit where cold air rushes out when the AC is on. There is also a vent on the side of the unit where heat and AC come out when unit is running. This seems a very inefficient use of resources.
I am also considering taking the whole house humidifier off completely as the water runs constantly and I apparently have no way of turning it off. Turned the shut off valve to no avail. Hmmm.
Any information here is welcomed!