A charcoal cooler is a storage chamber that uses evaporative cooling to keep food fresh without electricity. It's made of an open frame with charcoal-filled sides that are kept moist. * How it works Warm, dry air passes through the moist charcoal The charcoal draws energy from its surroundings Water evaporates into the air, cooling it * Where it's used They can be used to store fruits, vegetables, and dairy milk * How to build one Charcoal coolers can be built from locally available materials Yo

Tired of expensive AC bills? JD shows you how to build your own swamp cooler for under $20 using cheap parts from any hardware store. It’s the perfect DIY project to stay cool without breaking the bank. | CNET