It looks like a white camel with a fat hump on a pillar but in actual fact, its a hot water system. Rocket Stove technology has been around for many years, dating back to ancient China as a method of .
DIY: Rocket Stove Mass Heater - it warms your house for almost nothing! This post has videos & lots of info about these heaters + materials used to build them. You may already have some of the materials.