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hi guys, this is my first ever video upload.. so i am a bit nervous, i hope it doesn't show too much... more to come soon... sorry about the mp4 format, as i say, my first time...

https://www.youtube.com/watch?v=zUV1DgyK9ZE&feature=youtu.be

ok, this seems the best thing for survival (read title)... But...

When building in a mountain, how do you vent the heat, efficiently? (i know, place a cooler etc...)... So you dig into your mountain, you build 5 rooms, 3 of them have an outside wall... how do you vent the heat from the other 2 rooms, which do not have an outside wall? do i just mine a chanle to the outside and then place my cooler? or is there a more space efficient way??

Thanks