This trick from practicalpreppers.com show a great way to heat up your water while living off the grid.
With a thermosiphon, you can have a nearly endless supply of hot water without using any gas or electricity.
You will need a copper coil, a stove pipe, and a water heater. All of these materials are cheap and readily available at any hardware store or residential material reclamation depot.
Building survival equipment from scarps is an essential skill set for anyone who wants to be ready when shit hits the fan.
See how to build your own with the video below. Leave a comment on Facebook if you have any ideas to help improve this setup.