Feb
There are a couple of popular websites that instruct their readers in how to make their own passive water heater. One website, Instructables, gives step by step instructions for making your own solar thermal water heater for less than $5, if you’re willing to go rummaging for your materials. The other website, probably even more well known, is taking forever to load… Anyway, Mother Earth News, tells how to build your own passive solar water heater.
The benefits of building your own solar water heater are immediately seen. Compare the cost of a normal water heater, or even of conventional solar water heaters, to that of the water heater you could build. Although you may not be able to provide your entire household’s hot water with these, it could certainly reduce some of your energy costs.