Originally Posted by Nanaea
I'll try to measure it tonight for curiosity sake.
Thank you, that would be very helpful!
Originally Posted by descalabro
For maintenance purposes, I prefer to open my projectors and clean them once in a while than resorting to those kinds of solutions, which are usually really hard to get right because of DIY technology limitations and lack of know-how.
Unfortunately I have good reasons to put mine in a box: my last PJ, a W1070+, had major problems with dust blobs seeping into the light engine, and after trying to cure the problem for the third
time, BenQ gave up and gave us a new machine. Sadly I have read about dust blobs being an issue with this model, too. The other reason, while not a priority, is to lower the noise from the PJ itself as we sit right underneath it.
Anyway, here's a photo and some info:
You should be able to spot the location of the three fans currently installed in the box:
Fan 1 is just inside the intake hole in the top right corner, CFM 56.
Fan 2 is pointed at the PJ's intake and is 126 CFM.
Fan 3 is at the PJ's exhaust fan 2, sucking at 62 CFM.
This is to create positive pressure in order to minimize dust coming into the box. I have tested having just one intake fan (Fan 2), as well as a second exhaust fan (at the exhaust hole in the bottom left corner), however none of these configs made any real difference.
What I haven't tried, is adding another fan at the "Exhaust Fan 1" location. Compared to Exh fan 2, not a lot of air is exhausted from Exh fan 1, but maybe adding a second box fan could take a little load of the main exhaust "box fan"?
(EDIT: forgot to mention that the temp readings were all done watching 3D, since this is when the lamp is running the hottest)