Sri Lankan here. We've had this type of ceramic filter here for at least 35 years: https://cdn.shopify.com/s/files/1/0182/4859/7582/files/Ultra...
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Using clay to cool water in the summer is actually the original purpose of olla pots in the Southwest. They cool the water through evaporative cooling
replyAndy Ward demonstrated this https://www.youtube.com/watch?v=TBos0j0FszU
Mostly in rural regions, but the 'filtro de barro' water from your grandma's house beats ANY expensive filter you can get, haha!
replyThis and the low-tech electrical shower-head are the two everyday Brazilian things that never cease to amaze me.
replyBeing poor sucks but at the same time being poor also makes you find alternative solutions to the incredibly expensive solutions first world countries use today. I really wish Brazil can invest heavily into renewables and free itself from oil and electrify even more of everything we do.
reply> electrical shower-head
replyIs that for electrically heated water?
I know that in the US on-demand electric water heater uses an enormous amount of electricity, like 100 amps.
Brazilian electrical shower-heads use 20 to 30 amps max.
replyAt what voltage? (I understand Brazil has districts with both 127V and 220V mains.)
replyhttps://www.worldstandards.eu/electricity/plug-voltage-by-co...
Then they don't heat same volume to same temp, it's thermodynamics
replyYes but they are also less efficient because they don't have point-of-use placement
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