Hot water tank heated by wood burning stove. From Teach Nollaig, Tiny house in Ireland. Could be improved by adding a small sterling engine to power a circulation pump, allowing the hot water tank to be up higher [improving pressure]. Also INSULATION!
A water heater's energy efficiency is determined by the energy factor (EF), which is based on the amount of hot water produced per unit of fuel consumed over a typical day. The higher the energy factor, the more efficient the water heater.
Solar Water Heating Basics - What You Need to Heat Water with the Sun
How To Build a Wood Stove Water-Heating Attachment - As oil, gas and electricity prices will no doubt rise soon, we get more and more messages asking about how to combat it and asking about heating water with wood stoves.
DIY Solar Water Heating You can install a solar hot water kit yourself to supplement your existing system and save on energy costs. The system will often pay for itself in several years. I'm going to have solar panals
Illustration of an active, closed loop solar water heater. A large, flat panel called a flat plate collector is connected to a tank called a solar storage/backup water heater. Another option in sustainable residential living!