Umm... other than cutting it out? Haha The only other option is to contact the local Karate dojo and have them come chop an exhaust in it with their bare hands. :rasta:

I noticed that you have 2 previously unsuccessful grows. I can guarantee that you will have #3 if you don't find a way to exhange the air in there. Otherwise, you are basically just making a convection oven that will blow hot air all around the grow space.

Cool set-up though. Pretty stealth if you are able to seal up all lights. Although, if it is in the living room... it might be a bit strange that the speakers don't all work and there is a fan connected to the back of one of them. Haha.

But yeah, having the tools to cut intake/exhaust ports is crucial. Without them, you really will need to call that dojo.
HIIIIIIIYAAAAAAAAAAHHHHHHHHHHH chop.