First off, very cool project! Came across it and immediately had to build one, (just ordered a BenQ w1070). So kudos to you. 

Just a few questions:

Is this the glass window you used? If not, which one did you use?

http://m.edmundoptics.com/optics/windows-diffusers/specialty-windows/infrared-ir-material-windows/32806

Next, could you point me in the right direction for sound insulating foam? Did you order from "thefoamfactory" or a similar site?

Additionally, how did your intake and exhaust fans turn out when paired with a 12vdc wall wart? How loud are they? From what I've read, some people use 9 or 6v dc power supplies instead to slow the fan speed and thus reduce noise. And where did you purchase yours?

Finally, with a box encasing your projector unit how does your remote control communicate with the device? I'm assuming yout projector may just power up when it senses you've selected it's source on your amplifier/receiver. 

Any help would be appreciated! Thanks 

you would want to use a clear, anti reflective window. like these.

http://www.edmundoptics.com/optics/windows-diffusers/ultraviolet-uv-infrared-ir-windows/borofloat-borosilicate-windows/1913

the one you chose is opaque like a milk bottle and would not work.

You can even get Plastic AR coated windows.

http://www.edmundoptics.com/optics/windows-diffusers/visible-windows/anti-reflection-ar-coated-plastic-windows/3365

I used sound proofing material like this: http://www.quietpcusa.com/AcoustiPack-EXTRA-Sheet-MAX-PC-Soundproofing-Insulation-P681.aspx but any sound dampening material of good density should work, the box is the most import in channeling the sound.

As for fans you want to get the quietest largest fan you can with a  decent cfm. I ran them off a 9vdc supplt because that is all I had and it worked great.  the fans i used were: http://www.quietpcusa.com/Coolink-SWiF2-120P-PWM-Quiet-PC-Cooling-Fan-120mm-P731.aspx

I never had a remote since i got my projector used but you could either put a second IR window where the remote window is on the box or run what is called an IR extender to the outside. I don't know if they exist but an IR lightpipe might also work.

Heya! Very excited to get a projector (and then make it close to inaudible because I hate noise) - I'm not sure how you powered the pc fans? I'm guessing one intake and one exhaust, you list a 12vdc wall wart - I'm finding this online as a little power supply plug in thing? I'm using to seeing pc fan's with little mother board connectors or the like?

**Looks like wiring the fans together to the wall wart or any power supply I've got is the key (go YouTube :)

:-) yes, wire them in parallel so the voltage is the same.

Then just make sure the fan that blows out is the same side as the exhaust area of your projector. every projector is different so make sure you run your channels in the right places according to your fan.

yes, it reduces the noise from a annoying whining to something you can barely if at all notice.
the key is making sure you have enough twisty channels for the sound to get lost in and quiet fans for moving the air. the larger the fans the slower and quieter they will be.

I like this one! I bought a new project and its noise is killing me. I have a question: How good it works? Can this box really reduce the noise? Thank you