Heat pumps can drastically reduce the running cost of your swimming pool

For every £1 that you spend on electricity with a heat pump, approximately £5 of heat energy will go into your pool. The electricity to the heat pump simply powers the fan and compressor. The system takes heat from the surrounding air and transfers it to the pool.

A heat pump is approximately:-

  • 1/2 the cost of Natural Gas
  • 1/3 the cost of Oil or Propane
  • 1/5 the cost of Electric Resistance

These figures were produced BEFORE the fuel price inceases in the UK and so the savings are even greater.

Below is a guide to the costs to heat a pool or pond using different heating methods. This is an average/guide as the cost of heating will vary according to the time of year and the weather, however this still provides a useful illustration of the savings that using a heat pump can bring.

How Much Will It Cost to Run a Swimming Pool Heat Pump?

The following is an example of running costs from a Heat Perfector 32kw unit.

This would be for a large pool and smaller heat pumps will be less to run.

The calculations were made in June 2009.

  • Heat Perfector 32kw is rated at 19.3A which is 4.63kw.
  • Typical electricity costs are 9p per kwh (Based on NPower Sign Online 14 Tariff at June 2009)
  • Running costs are therefore 4.63kw x 9p = 41.6p per hour
  • Assuming the heat pump runs for an average of 4 hours per day (often less in summer) this would cost
  • 4hrs x 41.6p/hour = £1.66 per day

So running a 32kw heat pump for 4hrs a day would cost approx £1.66 per day – less than a sandwich !

This equates to £50.49 per month (£1.66 x 365 / 12) although for an outdoor pool, you would only run the heat pump in the summer months, say April to September

Like your house boiler, the amount of time that the heat pump needs to run for mainly depends on the weather.

In very warm weather and when used in conjunction with a solar cover, the heat pump may not need to run at all.

In colder weather (eg below 15c) the heat pump may need to run for between 4-8 hours on average.

Of course with a good summer, your pool heating costs will be lower than on a poor cold summer.

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