Learn:How to make air conditioner at home using Plastic Bottle This is a really awesome project totally made at home. To make an Eco-Cooler, you cut plastic bottles in half and then mount them on a board. Then, you place the board over a window, with the bottlenecks facing towards the inside of the house. The change in pressure that occurs when air enters the wider part of the bottle and comes out through the bottleneck cools the air

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