Very dang interesting! I would also point out that you aren't moving a lot of air. The more you move the better the results to a degree I would think.
This interest me so much because my main living space has 16feet vaulted ceilings. And I burn firewood, so I know the temp at the very top is where all my heat is going. I have poured concrete totally uninsulated floors. I plan to dig down to the footing and at least insulate the side of the slab, but my main concern is that by blowing the air onto my floor I would loose heat because it is such a thermal load.
I do run the ceiling fans sometimes, but they seem to move so much air even on the lowest setting that the air hitting you seems too cold.
I believe you should keep running the air tube and get use to how it makes the room feel. Then stop using it and see if you can tell a difference.
Thanks for posting!
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