cold air return in Bonus room

[johnm1]

I have a cold air return in my FROG or bonus room over the garage. Since the furnace/AC is in the attic, during the summer months hot air streams through the cold air return making the bonus room extremely warm. Suggestions on how to fix?

[HayZee518]

You are gonna need to make a door of some type that goes into the cold air return to stop this air flow. The a/c vents to the outside of the unit so you'll need to fan force the extra heat out of the garage. Use a couple of gable fans that come on when the a/c comes on. In the winter the cold air return needs to be open and the gable fans should be switchable to off