Instantaneous, or, Demand Water Heaters, provide hot water as it is needed. These tanks heat water without using storage tanks. Electric tankless water heaters have an electric element that heats the water.
Considerations For Buying Electric Tankless Water Heaters
Voltages for units sold range from 110 volts to 277 volts. Amperage draw must also be accommodated for using electric tankless water heaters as does ensuring the circuit breakers will support the unit. It may be necessary to have a separate circuit for the water heater to operate on.
Many electric tankless water heaters have a life expectancy of 20 years or more, and, easily replaceable parts so that period of time can be readily extended. Regular water heater maintenance will help the unit last longer. The Owner's Manual will provide information on maintenance requirements.
Electric tankless water heaters are energy efficient and inexpensive to operate. Water temperature is raised only when the unit is activated delivering a constant supply of hot water.
Peak demand determines the amount of water needed and should be considered when purchasing an electric tankless water heater. Combine the total number of sources of hot water expected to be used at one time to their flow rates and select a unit that will supply these demands. That is the unit needed.
Some units are thermostatically controlled and their output temperature can vary based on water flow rates and the inlet water temperature.
Choosing Electric Tankless Water Heaters
Not all electric tankless water heaters are energy efficient models, and, there are many models, styles, and, designs to choose from.
Unlike gas powered water heaters, electric tankless water heaters can be located away from the point of water use and this eliminates hot water having to travel further losing a little more energy along the way. By locating the unit closer to the water tap the heater will instantly heat the water on demand which makes these units very practical, however, electric tankless water heaters produce less volume of hot water.
Troubleshooting Electric Tankless Water Heaters
Before any troubleshooting is done make sure the power supply is turned off first. For units that are not supplying hot water due to a faulty electric thermostat simply replace the thermostat or the heating element.
For inadequate hot water supplies ensure the water heater is not being over taxed on water supply demands. Check the unit for crossed connections such as a hot water line that is connected to the cold water tap. Check for power and electric continuity at the lower heating element. Replace if needed but get rid of the sediment first. Should this element check out okay, examine the upper thermostat, and, replace it if need be.
If the unit has corrosion occurring inside the glass lined tank replace the sacrificial anode rod with a magnesium anode rod.
A rotten egg smell coming from the unit indicates bacteria in the tank sediment fed from decay of the sacrificial anode, fix this problem by flushing the water heater with hydrogen peroxide.
Electric tankless water heaters are very energy efficient for the most part and easily taken care of. Proper use and maintenance will allow the unit to function accordingly providing a better serving unit.
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