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![](https://lemmy.ml/pictrs/image/d3d059e3-fa3d-45af-ac93-ac894beba378.png)
If you live in a dry climate you can create a makeshift evaporation cooler with a fan, tub, water pump, and evap material.
Set it up in front of an opened window, blow it into the house, and open a window at the other side of the house. You can easily get 20 degree F drop in temp.
How many RVs will this vote take?