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This amazing Bangladeshi air cooler is made from plastic bottles, and
. . . uses no electricity.

Eco Cooler, is reportedly the world’s first-ever ‘zero electricity’ air conditioner, and
. . . its inventor wanted to get the concept out there to help as many people as possible.
The efficacy of the Eco Cooler varies widely based on conditions,
. . . but Grey Group reports it has the ability to reduce indoor temperatures,
. . . as much as 5 degrees Celsius,
. . . which is on par with what an electric centrally installed air conditioning system can do.

The Grey Group stepped in to help,
. . . using its position as a multinational advertising firm, to:
. . . . . . Put the plans online,
. . . . . . At no cost,
. . . . . . So that anyone can build their own Eco Cooler system.

6-20-2016 Source:  DIY air conditioning system