I like to open the quick dump when first turning system on, it dries/cools the air in the same vicinity that it draws from, once cool I close the quick dump louvers. In my mind it lessens the chance of condensate forming potential in the duct work.
If the unit was non-ducted, it wouldn't matter.
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Dan & Serena
2019 GMC SIERRA 2500 HD SLE
2015 Cougar X-Lite 29 RET
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