Thanks for the fast reply so run a closed duct for the lights with one end sucking out side and one end blowing out side and then have another one sucking air from room and venting it out doors and the last line coming in again?
I am trying to figure out how to cool 2 1000 watt HPS grow lights with ballasts out side the room one is a cool tube hooked up to a 6" fan and carbon scrubber the other is a large hood with glass bottom with 2 pc fans and a 6" duct booster hooked to the cool tube my temps are running way to high...
This is my first grow I have a total of 22 plants right now 9 KAT clones, 4 White Rhino clones, 4 BCN Diesel clones, 4 bubblicious clones and 1 Space Cadet clone. I am currently using 3 gallon pots with ocean forest dirt and 2 T5HO 8 bulb lights and only a box fan for ventilation. I have a...