There is also something else you will need to make the solar water heater work -- the sun.

VOA: special.2009.04.20

The solar water heater described here is based on a design developed some years ago in Afghanistan.

VOA: special.2009.04.20

Engineers had to boil off the remaining oxygen by turning on a heater in the tank.

VOA: special.2009.07.22

The second part of the solar water heater holds the water for the system.

VOA: special.2009.04.20

As you might expect, the heater will heat water only on sunny days.

VOA: special.2009.04.20

This solar water heater is easy to build and operate.

VOA: special.2011.04.25

There are two parts to the solar water heater.

VOA: special.2009.04.20