Ambient temp, racks, and my office!

[PsychD_Student]

So I sacrificed my office in my 2 bedroom house for my snake rack and ASF colony. I am a person who enjoys their own ambient temp to be 65-70 degrees However, I have closed/stopped up the vent in the second bedroom to maintain an ambient temp of 75-80. I'm building my replacement rack now. I have the one they're currently in sold-- just waiting for the replacement rack before I let them have it. I am planning to use the 4" heat tape on its way in parallel for belly heat in the back of the melamine rack.

My predicament:

I would like the option to use my office again! As a doc student, I work alot. I've been using my kitchen table, but I will sweat my ass off in the office if I used it for work again. The room doesn't smell in the least, so I wouldn't mind working there if the temp were more suitable for me. I also have holes poked in each tub for additional air flow-- not helping me with the option of keeping the room cooler, but Im sure my babies enjoy the fresh air.

Does anyone have any ideas for this issue? I will probably put some pegboard or similar type of thin particle board on the back of the rack to assist in insulation. However, I am willing to sacrifice the office and continue work in the dining room if necessary. If anyone can help this poor grad student get back in their office, I would GREATY appreciate it!!!