Build a Solar Heater on the Cheap

You can create a cheap solar heater for less than $10. What you need is a plexiglass, black spray paint, lots of pennies and a foam board. Once assembled it should be placed infront of a window. It can increase the room temperature by a minimum of 10 degrees depending on the amount of sunlight. Possibly saving $40/month. VIDEO->

Via Lifehacker

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