oh so you are pulling air into your flower chamber from your veg chamber... interesting. and you are exhausting air out your flower space into your attic using a 6" 265 cfm inline fan... did you have to cut a hole in the roof of your closet when you installed the fan? and is the inline fan noisy? I ask these ventilation questions because I am designing a small grow space and trying to determine what kind of fan exhaust fan I need to cool a 100 w HPS, which doesn't get very hot at all. You got it made with that attic over your closet!