I have a 7x7x7 grow space. I am putting in 2 1K lights; 1 1K watt MH and 1 1K watt HPS. I am going to veg with the MH and flower with Both MH and Hps side by side, with a c02 tank. The hoods are aircooled and my exhaust tubing is insulated. My exhaust will run from a cool spot outside into my...