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Aruba, June 9, 2016 - Air conditioning units are expensive devices both to buy and to run. When they stop working, that’s also an expensive problem to solve. Even so, if you live in a location with unbearably hot summers, an AC unit is essential. Not everyone has that option, though, but they no longer need it because the Eco-Cooler has been invented.

The Eco-Cooler is an air conditioner that requires no electricity to function and is created using waste products. It sounds too good to be true, but it exists and is in growing use across the country of its origin: Bangladesh, where 70% or residents live in tin huts without power.
To make an Eco-Cooler you take a piece of board cut to the size of a window on your house. Then drill holes in the board big enough to push a plastic neck through. Gather some old plastic bottles and cut the bottoms off, then slide the neck of each bottle through the holes and secure them with the cap. Do this until the board is full. Hang the board on the window and watch the temperature inside drop.
The change in temperature using an Eco-Cooler is at least 5 degrees Celsius. That may not seem like much, but when you’re living in a tin hut with no power that can reach 45 degrees in summer, it makes all the difference. I think you could improve the cooling further by also creating one of these for over the door as it would be a much larger area than the window.