heat exchange

Recently I started a grow and due to discretionary reasons I had to move it into my attic which is literally as hot as hell during the day. My grow box is 2" thick styrofoam and is insulated well from the environment. The problem isn't the attic though...it's the three cobs that are causing the...

Is the heat exchange effective? Searched forums but havent seen anything on them. Here is an example NOT AN ADVERTISEMENT blueearthsustainable.com/air-conditioning-heating/hydro-innovations-6-inch-ice-box-heat-exchanger-hsice-904490?gclid=CIrs4eHUos4CFcokgQodYaMA0Q Thanks