I put a strong exaust fan in the window leading out of the house and put a series of vents by the door to the grow room which led to the house which helped with two things.

The Stinky Air was actually being sucked back out of the house instead of being blown in...In other words since my exaust fan was so strong and the vents were not very big, I created a neggative air flow...instead of the stink sneeking through any crack or crevices back into my house the air was actually being sucked though those holes so that my exaust fan could breathe lets say...I hope you follow...im a little stoned here...i must say though that closing that door was some what of a tug!!

Aswell as obviousslly cools the room...

I hope i could have be of help