How about the Midwest (or Houston) where night temps are in 60-70s and day temps are in 90-100s, with 80-99% relative humidity most of the summer? The condensation in the morning (warming outside air, cooler blade casing (probably not the blades themselves)) could possibly cause shorts. I understand that Mr. Atwood says the OEM says it is within specs to run in blah-blah % humidity, but always with the caveat of non-condensing.
They tested this in the desert. What is average humidity there? Were there any problems with condensation?
Other problems are that as dust builds up, it becomes an insulator, it is especially bad for fan bearings, and dust build up on fan blades lowers their efficiency. With blade centers, you also have very confined paths for airflow, with even a small amount of blockage could take out not only that blade, but the ones next to it too. Were the air filters "standard" filters, or HEPA (costly)?
Trust me, I would love to pipe in frest air for cooling. But, I am not sure this test was run long enough (to EQ EOL, 3-5 yrs?) to get a true set of data.
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