Which Type of Energy is used with Tankless Water Heaters?

The first thing that you'll need to decide when selecting a Tankless Water Heater is the energy type. You will need to select between an Electric Tankless Water Heater (like Stiebel Eltron or Eemax Tankless Water Heaters) or a Gas-Fired Tankless Water Heater (like Rheem Tankless Water Heaters).

There are mainly two option: gas and electricity.

Gas
Gas fired tankless water heaters use in general either natural gas, delivered by your local utility or propane which is stored in a mega gas bottle in your backyard.

Electricity
Tankless water heaters operating on electricity are easier to install but require a very robust cables and circuit breakers. Heating with electric current generally is more expensive because because the generation of electricity already eats up a lot of energy.