How Much Electricity Does A Pool Heater Use?


How much electricity does a pool heater use?

power lines electricity

It’s one of the essential questions of the prospective pool heating customer. And the answer is entirely dependent on the type of pool heater being used.

The important variables to consider are the heater’s electrical input and output. The number that measures both of those variables is known as a Coefficient of Performance (COP). Each pool heater type uses energy differently to heat to your pool, so each one has a different COP.

We’ll quickly explain all of that, and more in the next few sections.

Pool Heat Pumps

how much electricity does a pool heat pump use | pool heating cost| pool heat pumps

Pool heat pumps have an average electrical input ranging from 5-7 kW per hour, with a corresponding output (heat) of 30-40kW. Since pool heat pumps use minimal electricity to harvest and transfer heat, they typically have the highest COPs, ranging between 5.0 and 6.0. And the higher the COP, the better.

Pool Heating Cost

With impressive energy efficiency, expect to pay $50-$150 per month (depending on the size of your pool) to operate your pool heat pump.

Solar Pool Heaters

solar pool heater | pool heating cost | solar pool heatingSolar pool heaters are one of the exceptions to the rules of energy consumption. That’s because they’re completely reliant on solar power.  But you do still need to run your pool pump to heat your water.

Also, consider that solar pool heaters are directly affected by the weather. If it’s too cloudy or cold, you won’t get reliable results.

This is why many pool owners use their pool heat pumps with solar heaters as backup.

Pool Heating Cost:

Monthly operation costs vary according to pool pump use


Electric Resistance Pool Heaters

electrical pool heater | electric pool heating | pool heating costElectric Resistance pool heaters are on the speedier side of pool heaters. But that speed comes at a cost. These heaters consume a heavy amount of electricity since they use resistors to generate heat.

And with a COP of less than 1.0, they’re often the most expensive pool heater to operate by a large margin.

Pool Heating Cost:

Monthly operation costs range anywhere from $400 to $600 per month (depending on the size of your pool).

Gas Pool Heaters

gas pool heater | pool heating costGas pool heaters technically shouldn’t be included in this post since they use natural gas to heat. However, this information serves a useful point of reference for prospective pool heater buyers.


That being said, gas pool heaters are recognized for their unrivaled level of heating speed. But on the other hand, they’re also unsurprisingly one of the most costly methods.

Gas pool heaters use gas (or propane) exclusively, and as we know, gas isn’t cheap.

Pool Heating Cost:

Expect to pay monthly operation costs ranging anywhere from $300 to $500 per month.

Closing note

Hopefully, this post helped to give you a better idea of how much electricity pool heaters use to heat your pool. Which pool heater you end up choosing depends entirely on your situation and what matters to you most as the consumer (speed, energy efficiency, cost, etc.) For a more in-depth differentiation of the major pool heaters types, see our recent pool heater comparison post.