looking more closely at your reflector pic, I am not sure you can air cool it. here is a pic of my 2 hps reflectors, Note the hoods have been sealed at the edges to minimize air leak, and also note the couplings that allow me to connect the ducting to them rather easily. Here are 2 ways you would be able to correct your heat problem in my opinion. A.)being the easiest, and B.)being the more challenging and a bit more resource consuming. both of which are dependant on the fact that your reflector can be air cooled,if not I suggest if your going to grow with hps you need to buy an air cooled reflector. A.) use an inline exaust fan 4'' should do for you(170cfm) connect that to the wallspace/attic, using 4'' ducting and seal it, run that to the fan, then from the fan to your hood/reflector then out the other side to a SOK or carbon filter. thus you will draw the air from your room past your light/.hood and out through the fan into your wall space, since warm air rises it should find its way up an out. B.) you do everything above except instead of running the end ducting to a carbon filter you run it back into the wall/attic space(a separate hole will be needed) by doing this you use the air in the wall or from the attic to cool the light without ever effecting the ambient air in your actual grow room(will keep really cool) as long as you are bringing in fresh cool air, and using another separate exaust fan that will periodically replace the air in your grow area.(this exaust fan will need to have a carbon filter on it). Note B.) is a little more of a pain in the ass because you need atleast 2 fans, 2 meaning you can draw air out as a seperate exaust w/ a filter and just leave a passive hole for fresh air to be drawn through. Optimum i would use 3 separate fans 1 for the hood,2nd to bring in fresh air(calculate cfm needed by multiplying WxLxH of your grow area) that will be the cfm u need to bring fresh air in. 3rd fan will exaust the room with a scrubber or carbon filter 4'' sok is what i use.
__________________ I do not condone drugs in the USA. All Photos I post are photos from Google Images. Everything I say is fictional Because I have nothing else better to do MY 1st closet grow GOT GWAP?
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