I built a wooden hushbox for my DLP projector. Lined it with Sonex and bought the high transmission glass pane at atlanta scientific as posted here earlier.
Overall the thing is great - it is almost totally silent now in my room (the fan on my DISH JVC VCR is louder than the projector) and the image is great
Heat seems to be a problem http://www.avsforum.com/ubb/frown.gif
The way mine is installed, it is "straddled" over two joists overhead. That is to say, the front few inches (where the air intake on the plus is) is right below one intra-joist span, and the back part is under another. I have about 10 inches of space where the fan blows out the hot air to the side of the hushbox, and basically the entire top of the thing is open to the joist space above.
I had assumed that given hot air rises... and that I had the front part of the projector in an area where cool air could come into the box that I would get some natural air circulation and it would suffice. However, after running a whole movie, if I open it up, all the cables are fairly warm and I think it is too hot (although it has never shut down due to heat).
I have seen those of you with super fancy installs of bathroom fans, etc. However, while I appreciate your approach, lets just say my construction skills are not quite up to that level plus I have tried to make minimal inpact to my house.
I can get some 12V radio shack fans that I could place above and have air blowing into the hushbox, or I could even run a bathroom vent fan from about 10 feet away and run the intake hose back into the hushbox. I'm not sure which would work better.
The big problem, however, is I have no idea how to switch either one of those so that they come on when needed and off when not. Either some sort of temperature sensor, or something related to power draw from the projector, but either way I'm clueless. I can do wiring and basic electrical, but when it comes to relays and switching I'm out of my element.
Could anyone help with this problem? How can I switch a fan on/off as needed without manual control?
Lex MC1/Sunfire CG/Hales Rev3's x3/M&K SS150 tripoles/Quadscan/Plus UP1100/Homemade screen