The concept of solar heating
The Man being a recalcitrant child of his Mother Nature has been trying for many centuries to prove his independence from her. He has been coming up with newer and newer methods of heating and feeding himself. He has been using the energy of rivers, wind, fire and even atom. However, it is only by late 20th century the mankind realised that our SUN is the most efficient, reliable and SAFE source of energy.
In a minute, the SUN gives the Earth as much energy as the entire mankind generates in a year. It is only necessary to collect and use this FREE energy!
The mankind spends most energy on the water heating. It accounts for up to 90% of all energy consumption in countries with the cold climate. Thus, the PolarSol system was founded on the concept of collecting and preserving the heat given us by the Sun!