Hey all, I just built a custom entertainment built in for my tv,projector screen. All of my equiptment is in a closed cabinet that vents out of a speaker grill above it. Like a sauna. My hr20 was running very warm 131f. I added 3 92mm fans to push the hot air out the top and it seems to work well.hr temp now 120f. I want to turn them off and on with a relay if I can find a output on a peice of equiptment that throws voltage enough to throw a relay when turned on and off. Any suggestions? I am using a 12v transformer for power just need a trigger. Everything is controlled with a harmony 890 so a toggle is to basic.