this post was submitted on 12 Jul 2025
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Depending on your room size and budget, i would recommend at leasr 12k btu and always try to get one with a heat pump so you can use it in winter too.
sticking the output hose out of the window is good enough to get started but even using the fabric window kit is good enough to be more comfortable.
For reference i used a 14k btu in a 25-30ish m2 room and it was more than enough in +38 heat. If you start to cool it down early in the day and close curtains you can prevent alot of heat later in the day.