i've heard you just use an old phone charger (or similar transformer) thats rated close to the fan voltage and amprage. i think... sorry but thats alls i know. i use inline duct fans.
GoldenGraham84 Reviewed by GoldenGraham84 on . Computer fan ventilation So I am building a 150 watt HPS grow box out of a huge cardboard box, the inside of which I have painted white. I'm only looking to grow 2-3 plants so the space seems perfect (~2x2). My question is about making efficient ventilation. I was going to build a PVC tube to run just above the light with holes drilled to suck the heat out. Obviously the one end would be sealed with the other end containing some kind of fan, with a mesh covered hole at the bottom of the box just at stem/root Rating: 5