TechIngredients did an interesting design for a swamp cooler using liquid desiccants: https://www.youtube.com/watch?v=7w4rg3UcsgI https://www.youtube.com/watch?

TechIngredients did an interesting design for a swamp cooler using liquid desiccants: https://www.youtube.com/watch?v=7w4rg3UcsgI https://www.youtube.com/watch?v=7w4rg3UcsgI Haven't yet built one myself, but it looks like a sensible design for climates that aren't overly humid.