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A garbage-free air conditioner has been set up in Bangladesh. The invention does not require large expenses and helps the inhabitants of many villages to better withstand the hot weather.
How to cool a room without electricity was invented by the developers of a project called Eco-Cooler. To create such a device, you need ordinary plastic bottles and a piece of cardboard. This simple construction has been installed in more than 25,000 houses in Bangladesh, whose inhabitants live in metal houses without electricity.
Making such an "air conditioner" is simple and quite cheap: on a piece of thick cardboard, you need to cut a hole the diameter of the mouth of the bottle.
Then cut half of the glass and leave the side with the neck and cut the top of the lid with scissors.
All you have to do is insert the bottles into the plate ...
..tighten the covers on the other side and install the structure on the window so that the necks look inside the room.
The larger the difference between the diameter of the bottle and the diameter of the neck, the better. Try to breathe with your mouth wide open in the palm of your hand — you will feel warmth. And if you blow like straw, the air will get colder, won't it?
The same simple principle works here: the hot air will enter the bottles and, due to the narrowing of the throat, it will cool down a bit and the room will become colder. The difference is about 5 degrees Celsius, but for warm countries even such a cold is already visible. This is exactly the case when it is brilliant, simple, useful and accessible.
