Although you might not believe this, solar water heating is available for hundreds of years. As technology did advance they ended up becoming really efficient. Nowadays the efficiency of an evacutated tube solar water heater stands somewhere over 90%. Basically this means that the sun’s energy is landing on the surface and is converted to heat at around 90%. The costs of generating energy are incredibly low when compared to regular sources.

Evacuated Tubes of Vacuum tubes are usually made out of glass. In most situations we see a double wall system based on Pyrex. Glass seen in an inner tube is usually coated on the outer surface with special absorbing coating. Inside every single tube the air is usually removed so that a vacuum is created. Copper heat pipes can be found in the tube’s middle area. Such a sealed heat pipe is good as it also includes in most possible cases anti freeze liquid and can help in absorbing infra red radiation better.

The one big advantage that appears with the use of evacuated tubes in solar water heating stands in the fact that these also work when we are faced with cold weather. Vacuums are to prevent your heat tubes from getting too cooled when the temperature is low. Also, evacuated tube systems can even absorb energy from the sun during winter and this is really important. In different circumstances you might be faced with the water being heated to 50 degrees by using just the water heater system.

The main reason why evacuated tubes were not popular a few years ago was the fact that they were not really available for anyone. In most situations they were utilized in different commercial equipments and they were really expensive. People could not include them in any system they created. Nowadays the tubes are warmly recommended by specialists and they are much more available. In the event taht your personal solar water heater system also includes some good evacuated tubes you will see that much efficiency is gained.