The 3rd floor of our home is an attic space that's been converted to a master suite. It has central air, but it just doesn't get cool enough up there. I've purchased a portable a/c unit that does a great job giving us the extra cooling. There are windows available for the venting, but the ideal spot for the unit doesn't have a window nearby. It does have access to a return air vent though. Could I pop off the cover and stick the 3' a/c venting hose down that return air duct? Not sure if this would be a problem or okay.
Any advice would be appreciated. Thanks!