With an ammo box, mason jar, and copper coil, I constructed an off grid water heater / heat exchanger / space heater. Important to note: - Notice that this is an \"open\" system. Meaning that I made sure to leave a vent hole to prevent any pressure buildup. - This system is not for drinking or cooking, as the ammo can and other components are definitely not food grade rated. I designed this as an experimental heater only. - Once the water became hot enough, I made sure to remove the copper coil from the fire, to ensure that the temperature tolerances of the hoses and fittings would not be exceeded. - And of course this is a prototype, meaning that it\'s not perfect, but something I\'ve been working to develop further. - The copper obviously isn\'t designed to be set directly in fire, but I simply wanted to see if the concept of heating with copper was possible. Now my goal is find a way to shield the copper from the flames in order to protect it from degradation. Outsider Store: https://teespring.com/en-GB/stores/the-outsider Here\'s a list of materials I used for the project: Copper Coil- https://amzn.to/2NJsEFZ Tall Ammo Box- https://amzn.to/2ZHn35A Metal Braided Flexy Hose- https://amzn.to/2zC1Lf4 Rain Barrel Spigot- https://amzn.to/2LcdQy7 Copper Pipe Connector- https://amzn.to/2Le1iq9 Candy Thermometer- https://amzn.to/2MMFiEC Digital Aquarium Thermometer- https://amzn.to/2LcmAV9 Snowmobile Camper Series: https://www.youtube.com/watch?v=XjACmr7QAU0&list=PLVv60L_JAEHYAmwLKWA7mrVLzTyFjtySt Other equipment I use on a regular basis: Trail Cam: https://amzn.to/2Q6MD0B Wristwatch- https://amzn.to/2ZTuTcM Fiskars Axe- https://amzn.to/2EJVdhR Pocket Knife- https://amzn.to/2Udm1MJ Fixed Blade Knife- https://amzn.to/2HnrT2i Drone- https://amzn.to/2IPucxH GoPro- https://amzn.to/2XDHRee Camcorder- https://amzn.to/2HnpLHq Solar Power Bank: https://amzn.to/2Fgt4Og Solar Panel (similar)- https://amzn.to/2D18amh Propane Cook Stove- https://amzn.to/2CaGXgy Little Power Bank- https://amzn.to/2TeUpui Handheld flashlight: https://amzn.to/2unfweO Headlamp: https://amzn.to/2CyEe0u Camping Wood Stove- https://amzn.to/2UA0luc Backup Camcorder- https://amzn.to/2Tb3sMG Flexible Tripod- https://amzn.to/2EIlRrj Cordless Drills- https://amzn.to/2Tb4tV0 Chainsaw (Poulan)- https://amzn.to/2IP1fls Chainsaw (Echo)- https://amzn.to/2VykyB2