gn1252
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The hose is optional. Can check their faqs: https://www.coolzy.com/sg/support/faqs/https://www.coolzy.com/us/small-room-ventilation-portable-air-conditioner/
I checked out this machine before.
Still need hose as you see from the website.
Since Coolzy has no exhaust hose, surely the warm air must heat the room?
Coolzy releases only 300 Watts, similar to three people in the room. Coolzy directs its warm air exhaust to the ceiling where the heat is absorbed, just like the warmth from your fridge which you don’t notice (warm air rises naturally). Any excess finds its way out of open windows or doors.