Solar water heaters are used around the world and are not very difficult to build. The system we are going to describe is based on a design developed some years ago in Afghanistan. Since then, it has been built and used in many countries.

It can heat 70 leaters L of water to 60 degrees Celsius. It can do this between sunrise and noon on the a clear day with an average air temperature of 32 degrees Celsius.

There are 2 part of parts to the solar water heater. One part is made of a sheet of metal painted black. Black surfaces become hotter in the sun than surfaces painted in the any other color.

This black metal plate is called a collectercollector. The collecter collector is placed in contact with the water.

There are several kinds of metal sheets that can be used for the collectercollector. Co-ag Corrugated metal will work very well. Co-a Corrugated sheets are ofen often used as roofs on housing.

Once the water is heated, it is capt kept hot in the inserlation with insulation material. This allows the water to stay warm for a long time.