Okay Guys so this is my first post on this forum so excuse the Newbie here, Anyways.

I am looking into getting my first laser system (Epilog Zing 16) for a starting out home business laser and i do live in Alaska, So i have a problem with the venting.
In the summertime i am fine with venting to the outside from my room through just cracking the window and running my 4" Hose outside to my fan but i am trying to figure out what i can do in the winter time without letting all the heat out!! I do rent the house with my wife and another couple so i am not about to ask my landlord if i can drill a 4.25" hole in his wall, so my question to you guys\girls is how the heck can i work in the winter (7 Months) without lettin all the heat out into the -30F/-40F weather and also if you have any pointers on the a specific fan that would be awesome its going to require a minimum of 400cfm at 6" static pressure Thanks a bunch folks!!!!