i got a 400watt hps from HTG the cheap one and it gets way to hot so i bought a 4" can fan and was told it was would pull enough air out to keep it cool inside and it dont so how could i keep it cool with the fan i have it installed at the top of the cab it is a 4 x 2 x 3 area i also have a small fan bringing in cool air i just dont understand how it could still be getting 100 with the door closed? This is extremely frustrating someone please help
Are you air cooling your lights, or do you just have the fan set up as an exhaust? The temps outside your growbox also need to be taken into consideration. I would say seal up your reflector, and air cool it, then also have an exhaust fan setup pulling air out of the box. Hope that helps a little.
You attach a seperate vortex fan to the ducting which is connected to your sealed hood or cool tube. And yes, they work great.