Mitsubishi Heat Pumps and Humidity
This is more of a rant than anything else.
My Mitsubishi mini split heads immediately spit out humid air from the wet coils as soon as the cooling cycle is done, increasing my house’s RH to the high 60s, nearly 70%. Even if I turn the unit off before the cycle ends, there’s still condensate sitting on those coils an hour later waiting to turn my house back into a swamp. If I lived in a leaky house in the southwest of course it wouldn’t be a problem because the unit would be running all the time, but in New England it’s just not possible to size for summer and winter in a single unit.
Yes, the head is level and draining, no the condensate line is not clogged, and no, “Dry Mode” does not fix the problem.
I’m in disbelief that in order to use an efficient product like a heat pump you also have to run a dehumidifier, ultimately using more energy than a shitty air con. Drives me nuts! Anyone else in the northern part of the state struggle with this?
Posted Jul 9, 2025, 4:01 AM UTC