Tankless Water Heater
Tankless water heaters were originally quite popular in Japan and Europe. Later on they appeared in United States also.
A special feature of the tankless water heaters is that they heat the water and supply it whenever it is needed. There is a heating device that is triggered by the flow of water. Once activated the heater supplies a constant flow of hot water.
The complaint against them that they take long to get the hot water can be resolved by using a specialized pump which in combination with the tankless unit can get you water at full blast at less than half the time.
The other complaint that the tankless water heaters cause a lot of water wastage is met by using a specialized pumping system which conserves water and prevents its wastage.
Selecting A Tankless Water Heater
You need to first assess your water requirement before selecting the right tankless water heater. This can be done by listing the number of hot water faucets you expect to open at any one time. Add up their flow rates and you get the desired flow rate of the water heater. Most tankless water heaters are thermostatically controlled. They can adjust output temperature according to the water flow rate and the inlet water temperature.
Tankless water heaters can also be connected with solar heating systems. In that case the tankless water heater has only to raise the temperature of the water already heated by the solar energy.
If you need many outlets of hot water from one central source, you can use a small electric unit as a booster for the remote bathroom or a kitchen.
Bosch Tankless Water Heaters
Robert Bosch Inc has developed many on demand models of instantaneous tankless water heaters. They operate on liquid propane gas, natural gas and electricity and are available for every need. Their Aqua Star 125 HX model is fitted with hydro-generated ignition system that requires no standing pilot, electricity or batteries. This model is the first one to use the patented technique for pilot ignition which works quite like the turbines in hydroelectric dams using the flow of water to generate electricity.
When the hot water tap is turned on, the cold water flows through the hydro generator spinning the tiny turbine which at once generates electricity. This electric current creates the spark to light the burners and the water is heated as it passes through the copper heat exchanger.
