How to cool a room with water
Water can be used to cool a room when you don't have air conditioning or want to save electricity. Evaporation is the best method and these methods are often referred to as a "swamp cooler".
 Face cloth or small towel method
- Use a usual room fan with a grill on the front.
- Dip a face cloth or a small towel into cold water. If possible, use water in a bowl filled with ice cubes to make it as cool as possible.
- Wring the cloth out so that it's damp, not dripping wet.
- Lay the cloth over the fan. As it blows the air out, it'll circulate through the cloth and the air will feel cooler. Make sure that the cloth cannot get caught on the fan in any way at all––if this is a possibility, don't use this method.
- Replace the cloths frequently, as they dry out.
- On a larger scale, soaked blankets or sheets can be hung in front of a window or porch screen and the night breeze can go through the wet fabric and cool the room.
 Ice bowl in front of fan
- Another approach is to place a bowl of ice water in front of a fan. Keep refilling with ice as it melts.
 Pots of water
- Find a few round bowls such as fishbowls. They should be medium to large in size.
- Lay down some soil in the base of each bowl. Add water plants.
- Fill with water.
- Place the bowls under a window. Every time the window is open, the breeze will flow over the bowls of water and the help to cool the air in the room.
- This method can also be used in large containers outdoors provided you don't live where mosquitoes are a health problem.
- Keep doors shut and drapes drawn to help cool a room space.
- Keep your hair wet; this can help to keep you cool when it's really hot.
- Spray water mist on your skin frequently from a spray bottle.
- Have a bath in cold water or a cold water foot bath (ice optional).
- You can buy an evaporative cooler that uses water to cool; this needs frequent refilling and needs to be run on electricity.