I did pretty much the same as above (closing off bedroom and bath ceiling vents) and keep all doors open during the day with the ceiling fan on. I remove the vent covers in the garage when I really need to cool it. One thing I found was I was leaking cold air into the return in the main AC. I took the foil tape and taped that hole area to really seal it. In high 90s and sunshine, it does well. Doing all that I haven't felt the need for the garage AC.
__________________
2011 Silverado 3500 dually diesel
2012 Keystone Raptor 410LEV
Previous 2001 Jayco 23B
Previous 1973 Coleman Popup
|