Here is how it works. I have not set it up completely yet. I am waiting for the HydroHut skin to come back, and waiting for them to get a little bigger to put the HPS in there.
Here is what it looks like. Here is the Blower fan with an OdorSok filter on it. The OdorSok works great for smaller grows. Its way light, can be cleaned in a washing machine and they are cheap (80 bux I think for the 6inch one). That is a Vortex 6inch blower fan. They work great, they are a little pricy and loud though..
I just kind of taped it to the HydroHut brackets because the straps included are way too small. It seems too small to hold the blower too but the site says that it is supposed to fit. Another reason why HydroHut brand lacks..
See you take the duct from the last picture and connect it to this intake for the reflector. Be sure to get the brackets to make sure it stays on there. There is nothing worse than coming back to your room and it being way too hot bacause the duct blew off..
Then on the other side just hook up a bigger piece of ducting that you can put out your window.
When I get my Hut back and get ready to flower I will show everyone how to duct through the hut walls. It is really a basic idea. That blower fan is blowing away from the filter. Sucking the air through the OdorSok. I love the air cooled idea. I wonder how it would work if you just ducted your a/c through the light? I don't know, this way the light can be like 4 inches away and not be too hot, but I keep it furter just in case. Let me know if you have any ideas or questions, I could probably help you. I have only used this to flower once but it worked great..