A ductless heating system

I have typically worked in the aviation industry for my whole adult life, doing everything from long term avionics to operational flying.  In my newest job, I often get to travel to different locations to perform service calls of different maintenance procedures. Having spent most of my long career in the warmer weather of the southeastern corner of the country, I occasionally encounter weird things in areas that have colder weather that are somewhat foreign to me in the warm south.  Snow tires are one thing that I have never had any reason or need to use, but on one of my most recent trips, I was spending some time in a hangar on the central eastern seaboard in February. The snow was falling outside and the hangar was as hot as could be. The hangar had a dome shape so it was heated with an advanced furnace method that functioned by heating water that was pumped through a series of pipes in the hangar and then radiated from the ceiling. I found this particularly unusual at first, as heat usually rises, however given the nature of the hangar, they couldn’t have pipes or radiators low on the floor to impede the servicing of any aircraft, so they were installed the heater in the ceiling.  But with the hanger’s dome shape, the heater worked by funneling the colder air upwards and the heated air circulated back down the sides of the curved walls. It was a undoubtedly efficient system, and once the maintenance supervisor explained to myself and the others how it worked, I thought it was quite a clever idea. I’ve added that in the back of my mind as one of those unique-to-the-environment ideas that I just don’t get to see where I live.


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