Well this question is in regards to warped fresnels and slots in the box and fans. Okay so what if the slot was cut right before the first fresnel wouldnt this keep the lcd cool and also help with keeping the fres from warping. Also my box is gonna be oversized couldnt I just put the fans at the top so it sucks the air straight through. Does this make sense?

I think that the front of the box (from the front of the LCD to the triplet) should be sealed from the rest of the box. None of the heat should get past the LCD, so there isn't much need to cool the front of the box (unless you have concerns about your controller overheating, or your ballast is in the front). You should have a slot on the box (positioned on whatever side, top or bottom that is most esthetically pleasing to you) so that incoming cool air can travel between the LCD and rear fresnel. You can then have that air exit out the opposite side from the air intake (for direct cooling of the LCD) or you can have the air flow under or over the rear fresnel into the light chamber. If you have the air exit out the opposite side, you'll want a second fan to exhaust the air out of the light chamber.

See this section of the Pro Guide (which, thankfully, is back online):
http://lumenlab.com/wiki/index.php/DIY_Pro...Keeping_it_Cool

I think I know what you're saying...

It would work quite well to put the fans on one end of the fresnels and the slot on the other. I'm pretty sure you're going to want some air circulation in the back/bulb area of the projector as well, otherwise you're likely to create an oven with the bulb.

maybe this crude pic will help you understand.

You would still have some heat pass through the fresnel, and with it closed in like that, heat build-up would not be good for your LCD.
The methods found in the Pro Wiki are tried and true.

Also remember this is a vertical so as you see the pic of course a mirror in there also. Well this is my thinking heat rises so haviung it up there would exhaust the heat. or maybe a 120 fan at top and another 120 at the bottom.????????????????????????????????

The picture or diagram you have is do able and it may help with keeping your lcd cool. What is shown is similar to what some have tried with vertical builds. But I do not think it will help with warped fresnels problems. A better design would be one fan blowing out in the cooling gap between the lcd and rear fres, and one behind the light system blowing out to.

Some helpful tips to reduce fres warpage a good strong frame to hold the fresnel and use the lexan to take the direct heat hit, reverse the opening at the lexan. ie: intake opening at top between lcd and fresnel, opening underneath the fresnel frame, opening on top of lexan.

This will have the coolest air drawn between the lcd the fresnel, airflow will then flow up between lexan and fresnel and be pulled towards the lightbox and exit out of the back of box.

The diagram also has one other flaw not mentioned, twice as much chance of light leakage which means four times the work to reduce or eliminate said problem.

Also I am not to sure about having any type of vent or fans up in the mirror/ triplet area I would be worried about light artifacts showing up with the mirror up there and lost of light through the triplet.

Well... for a vertical, you can take a look at how iPO isolated his light engine to keep his box cool (I believe the picture towards the bottom shows the box with the back panel off):

http://www.lumenlab.com/forums/index.php?s...st&p=265628

You can see that the light engine is in a "tube" with air entering on one side, and exiting on the other. I can't tell if he has another fan at the top of his projector, but you can see that he's isolated the top (LCD to triplet) of the box from the bottom. Now that I take another look at it, it seems he also has a fan cooling the slot between the LCD and bottom fresnel.

Here's a pic of TESCORP's Vertical:

http://www.lumenlab.com/forums/index.php?s...st&p=226516

You can see, lower down on the page, how the frame for the LCD goes almost all the way to the back of the enclosure only leaving room for the wires to pass through (this may have been sealed later with something like weatherstripping). The lower frame is for the LCD, the middle one is for the front (or top) fresnel and the top frame is for the mirror.

http://www.lumenlab.com/forums/index.php?s...st&p=226719

If you are looking for ideas

SculptorMs has one of the best perspective renderings
Also check out post 56 nice photo

http://www.lumenlab.com/forums/index.php?s...mp;hl=sculptorm

http://www.lumenlab.com/forums/index.php?s...ptorm&st=50