submitted 3 weeks ago by Cyber@feddit.uk to c/homeassistant@lemmy.world

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It's already 25DegC in my home office.

The best cooling automation I have so far is to turn the fan on when it's 25 for >5mins.

Is there a nice zigbee / ESP32 evaporation cooler that I can enjoying setting up with HA?

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[-] ayyy@sh.itjust.works 14 points 3 weeks ago* (last edited 3 weeks ago)

Before you bother with a swamp cooler: have you measured the relative humidity % in the room on a hot day? They only help in very specific climates.

[-] digger@lemmy.ca 5 points 3 weeks ago

Here! Have a website with some helpful charts!

https://learnmetrics.com/evaporative-cooler-chart-swamp-cooler/

[-] mbirth@lemmy.ml 6 points 3 weeks ago

For a website called Learn Metrics to give temperatures in Fahrenheit is wild.

[-] entwine413@lemm.ee 0 points 2 weeks ago

Metrics and the metric system are two different things.

[-] Oisteink@feddit.nl 1 points 1 week ago

Yeah, just like pounds

[-] Cyber@feddit.uk 2 points 3 weeks ago

Thanks

Hmmm... my office is 50~60%:

At 55% relative humidity, the swamp cooler will be able to drop the temperature from 90°F to 81°F. That’s a -9°F drop.

So, it'll be able to drop 32°C to 27°C...

Looks like I might have to look for a different solution... or have a higher electricity bill by running a dehumidifier too.

[-] ExcessShiv@lemmy.dbzer0.com 3 points 3 weeks ago

At that point just get an AC unit

[-] Test_Tickles@lemmy.world 2 points 3 weeks ago

Dehumidifiers are air-conditioners... Like literally. So, you would be running a swamp cooler to cool the room by adding humidity, but because dehumidifiers produce excess heat, you would then be adding heat to dehumidify...

[-] Cyber@feddit.uk 1 points 3 weeks ago

Yeah, when you put it like that... yeah it's madness.

this post was submitted on 01 May 2025

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