Egloo

3D Printed non-electrical heater than can heat an entire room.
 
Egloo is born to combat waste continuous electrical energy used for heating domestic environments, offering as an alternative fueled heating candles.

The 3D Printed design is simple: Egloo features a double-dome layout where the smaller, inner dome heats up quickly, then slowly radiates heat to the outer dome so that the unit remains safe enough to touch. The designer claims that it takes only about five minutes for the Egloo to reach the highest temperature (the interior dome would be between 140 and 180 degrees Celsius, and the outer at between 30 and 50), and with four candles, will last long enough to heat a 20-square-meter (215-square-foot) space for up to five hours -- with each candle refill costing about an estimated 10 cents.