Closed-air system (good or bad)

I have a chance to do a grow at a place that is difficult to vent intake and exhaust from different areas. I've heard of recirculating systems that use air conditioners and co2 burners to condition an enclosed room. Has anyone done this or know of anywhere to get more info on this? Any major problems with it?

Complete climate control is the ultimate.... it can be a bit expensive in the FRONT end ... BUT if you are committed and totally dial the sytem.. it can be a BIG PRODUCER.

Here are some pictures that are featured in SeeMoreBuds Volume 3 - The Perfect Garden.

This room is completed SEALED and the climate is controled 100%.... it produces 5+lbs with 2 - 1000 watt HPS bulbs

cheers

So I went and ordered the dvd's. I've looked them over in the past a copuple of times and what the hell it's Christmas, time to treat myself. I hope you get a kick back out of it. I hope ther's a set up tutorial on closed systems. I understand the upfront costs, but I like to do things right and this seems like the set up for my scenario. Do you know of any more info? I've tried searching a lot of sites even tried the hospital air recirc searches.