I know this may not be super helpful since everything I did is pretty much homemade but here is my solution. It may give you ideas to solve your issues.
I have my glowforge in a naturally cool basement (65-70) and I am in Wisconsin so the outside temperature and humidity is rarely the same as the basement. I never leave the Glowforge connected to the outdoors when I’m not using it. My setup allows me to completely disconnect the Glowforge and keep air from the outside unintendedly letting cold or warm outside air (and critters) in the laser or the basement.