My brother is building a bunker in his backyard

My brother is one of those guys that you would call a prepper. At this very moment, he is building a bunker out in his backyard and supplying it with all kinds of things. The only thing that he’s not sure about at this point is the heating and cooling system that he wants to use. He says that having a proper ventilation system is probably the most important thing of all for his bunker. I guess that makes sense, too, because if you don’t have a proper ventilation system and your air quality is no good, then all the food and water that you have stored away isn’t going to help you very much. At least that’s what I’ve been thinking lately. My brother has had a couple of his friends who are HVAC technicians come out to his property to check out the bunker. He doesn’t want them to come there if the end of the world comes, though. I told him that he shouldn’t tell anyone at all about the bunker if he really wants to keep it for himself in case of an emergency! He doesn’t listen to me, though. So far, he’s had a plumber, an electrician, and those two HVAC technicians out to get their opinions. He’s so weird. I think that he’s actually proud of this thing and he wants to show it off. I don’t know what the HVAC technicians told him, but he’s been working on putting in more hidden air ducts ever since they were here. Hopefully he’ll get the air quality situation worked out.

a/c corporation