Thread: WINDOW AC unit
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Old 02-01-2023, 03:15 PM   #8
GreG L.
Montana Fan
 
Join Date: Jun 2018
Location: Jacksonville
Posts: 381
M.O.C. #21993
Mini Splits are far more efficient that what's on the roof but they are still just heat pumps.
The best ones ($$$) will heat down close to 20 deg outside temp, below that they need an electric heater in them to produce heat, not very cost effective. There is a tone of information online on how they work and their limitations.
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