This pamphlet describes a batch type design consisting of a tank in an insulated box with glazing to admit solar energy—sometimes referred to as a bread box water heater. It also serves as a hot water reservoir for thermal solar technology. Essentially it is a reflector-less, slant-faced, box cooker adapted to heat water.

Batch-type homemade solar hot water heaters are among the most cost effective solar devices. They can be used alone with the understanding that water temperatures will fluctuate with the time of day and weather, or they may be used to preheat water feeding into a gas or electric water heater to reduce the fuel costs of bringing water to a preset temperature.

This guide to thermal solar technology will teach you:

What design parameters do I need to be familiar with before creating my own solar hot water heater?
What is the installation process?
How should I prep the tank?
What type of plumbing should I use?

Not only is this guide ideal for survivalist or emergency preparedness situations, but in a time with increasing energy costs, having your own effective thermal solar technology is a bonus for any homeowner!