Have you ever heard of a swamp cooler? It runs off the principal of evaporation.
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When the water on the filter media drys off by a fan blowing air across the media, the air cools down. I show you just how much. Results were surprising! Next project is to build a solar water distiller for water for my evaporative coolers and pure drinking water.
Here is where to get temp gauges:https://www.ebay.com/itm/232778925081
Honeywell swamp cooler:
https://www.ebay.com/itm/263493285231
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Check out my video the "Ultimate prep"
This is the one prep you can't go without. IMPORTANT to ALL!

Preppers love this stuff: Hiking, camping, campers, RV cabin in the woods farm SUV diesel 4x4 pickup truck "clean drinking water" "water filters" "RO water" off grid survivalist don't worry about an EMP, they have emp proof cars or trucks.


"Prep to live, don't live to prep."
ETprepper