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Make your heater more efficient


Only heat your pool or spa when needed. If the spa has a standby heater then switch it off when the spa is not in use.

Pool heaters

Often pools are heated to temperatures higher than necessary so the first thing to check is whether the temperature can be lowered a little bit. The most common guide is between 27 – 29 degrees Celcius. This can have an impact on the cost of energy bills immediately.

You can also link heater controls to ambient temperature so that the pool is not being heated as much in summer when both the air and the water are warmer.

Spa pools or hot tubs

If you have an outdoor spa pool then energy is used for heating water as well for pumping the water through the spray jets. Spa pools either have an internal heater or use the hot water system to heat the water to 34 - 38 degrees Celsius. Running costs will vary depending on which method is used, how often the spa is used and how much water evaporates.

Solar heating systems can be used to pre-heat spa water thus reducing the amount of time and energy required to bring the spa up to operating temperature. As a rough guide - you will need an area of roof space twice the surface area of your spa to mount the solar panels or evacuated tubes on.

Heat pools and spas efficiently

  • Only heat your pool or spa when needed and ensure the spa has a standby heater that can be switched off when not in use
  • Avoid shading outdoor pools from the sun because water that receives direct sunlight will be warmer to swim in and need less artificial heating
  • You can also reduce heat loss by using a pool or spa cover
  • Prevent heat loss by ensuring the spa insulation is in good condition - check your pool and spa regularly for cracks and leaks

If your pool or spa heater is old then you might consider upgrading it