Do You Know How Electric Pool Heater Works?

For any kind of heating solution for your home or in the spa, electric pool heaters usually are preferred. They are known for their speed and compact size, but what will set apart this kind of heater will be how it can produce heat.

How does it work?

All these electric pool heaters available in the market are having very simple and also effective design. If you compare them with other type of pool heat pumps, only few important components of electric heaters will actually operate.

Among them the most important is the basic heating element which is a metal resistor. This heating element will run throughout good portion of your heating unit which is responsible for the heating your pool.

As the electrical current will be applied to element, it will quickly start generating heat energy. While water will be flowing over heating element, heat will be dispersed, and will warm the water and also simultaneously cool the resistor.

Warm water will continue to flow into pool, and such cycle will continue to repeat until desired pool temperature will be achieved. Generally, this process is almost the same for pool heaters which is electrical inground and also pool heaters that is electrical above ground.

Unlike any pool heat pumps, heating process of the electric resistance type pool heater will rely exclusively on electricity. Naturally, you would imagine, that it comes with few benefits like lower cost of electric pool heater installation.

Like gas heaters, electric resistance heaters, can also perform efficiently irrespective of factors such as weather or temperature.

Let us now take a little closer look about few pros and cons of the Electric Pool Heaters


  • Performance of electric resistance heaters will remain unaffected by any kind of weather or temperature
  • Capability of heating all throughout the year
  • Compact design and size
  • Environmentally friendly
  • Lower purchase/installation cost.


  • Lower energy-efficiency
  • Lower BTU output
  • Higher operational cost
  • Shorter lifespan about 5 to 10 years
  • Very well suited for small pool set-ups or spas

So far whatever we have discussed in this write up, by now you must have pretty good idea about if an electric heater for swimming pool will be right for you.

Based on the pool size, you may consider various alternatives or combinations with more energy efficient type of heat pump and pool heater.

In order to get better understanding, know the difference between major pool heater types.