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A comment on Hitachi launches CO2 heat pump water heaters with solar-friendly tariff controls. Parent comment

Re:Hitachi launches CO2 heat pump water heaters with solar-f... by coryrc on Thursday September 10, 2026 @07:00PM (#49651297)
It's 98% humidity for months, you need to worry about the whole house!
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Re:Hitachi launches CO2 heat pump water heaters with solar-f... by eru on Monday September 14, 2026 @01:20AM (#49692305)
Are you sure about that number?

I live in famously hot and humid Singapore, and it's usually around 70% to 80% humidity here during the day. I find it hard to believe Japan is even muggier?

I just randomly checked the weather for Osaka and Tokyo (on Google) and they have about 60% to 70% at the moment.

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Re:Hitachi launches CO2 heat pump water heaters with solar-f... by coryrc on Sunday September 20, 2026 @04:37PM (#49779836)
No, I exaggerated slightly; but we're past the wettest season now AFAIK.
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