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2. Yes, Swamp Coolers Really Work—But Only When You Follow These ...

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   Best Value: Hessaire MC37M 3,100-CFM Evaporative Cooler. Best Large: Hessaire MC61M Evaporative Cooler. Best for Extra Large Spaces: Big Ass Fans Cool-Space 400 Evaporative Swamp Cooler. Best For ...

3. Portable Swamp Coolers That Lower Temps (and Energy Costs)

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   This Hessaire model can cool rooms of up to 500 square feet, far more space than similarly priced models (like the Luma Comfort evaporative cooler), and the company makes even more powerful models ...

4. RS Recommends: Don’t Have AC? Here’s Why Evaporative Coolers ...

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   As the water evaporates, the air inside the cooler drops by up to 15 degrees. The wet air gets absorbed into panels built into the sides of the co RS Recommends: Don’t Have AC?

5. Pot-in-pot refrigerator - Wikipedia

   en.wikipedia.org/wiki/Pot-in-pot_refrigerator

   A pot-in-pot refrigerator, clay pot cooler [1] or zeer (Arabic: زير) is an evaporative cooling refrigeration device which does not use electricity. It uses a porous outer clay pot (lined with wet sand) containing an inner pot (which can be glazed to prevent penetration by the liquid) within which the food is placed.

6. Absorption refrigerator - Wikipedia

   en.wikipedia.org/wiki/Absorption_refrigerator

   Common absorption refrigerators use a refrigerant with a very low boiling point (less than −18 °C (0 °F)) just like compressor refrigerators.Compression refrigerators typically use an HCFC or HFC, while absorption refrigerators typically use ammonia or water and need at least a second fluid able to absorb the coolant, the absorbent, respectively water (for ammonia) or brine (for water).

7. Water cooling - Wikipedia

   en.wikipedia.org/wiki/Water_cooling

   Water is inexpensive, non-toxic, and available over most of the earth's surface.Liquid cooling offers higher thermal conductivity than air cooling. Water has unusually high specific heat capacity among commonly available liquids at room temperature and atmospheric pressure allowing efficient heat transfer over distance with low rates of mass transfer.