My niece once told me there was a broad line between fighter jets and commercial air freight, and I didn’t quite believe what she was saying.
Between the thermogenesis required when you are up on cloud level and the bad actors in the smuggling game, I couldn’t see how different kinds of planes could adapt to different ventilation needs.
But, see, an HVAC technician could explain it all quite easily. See, once the place is in the air, it is in its own micro environment much like a new car. The car has its own manufacturing warranties just like a new car or any other new and interesting vehicle. The HVAC providers typically cannot provide service to these types of vehicles and can not typically find a way into that sector. Really, all that is needed on the planes is hydronic heating with small air chambers for the pumping. If you’ve seen the new ductless HVAC units you would know that this is really not too hard to accomplish. There are only two ways to get the temperature you want. The matter of outside being a cloud does not matter. My HVAC technician explained it all to me, but it is rather complex, so I am not sure that you would be able to follow it. First you have to get a tiny more self discipline in the listening department, as I can see your attention is gone with the wind and along with the indoor air quality. This is the last time I try to have a longer conversation with my HVAC provider.