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Indoor aquatic facilities such as Moana Pool use an enormous amount of energy.

In 2006 the Dunedin City Council and the Government, through the Energy Efficiency and Conservation Authority (EECA), worked in partnership to find an effective way to recycle the facility's wasted energy and reduce humidity levels at the centre.

The solution

• We installed a heat recovery system that uses up to eight heat pumps to extract the heated air from the facility.
• The extracted air enters the heat pumps at 26 degrees Celsius and once the energy has been removed leaves the facility at about 1.5-2 degrees Celcius.
• The extracted energy is used to heat four of the centre's six pools and its domestic hot water.

Savings generated by the system

• By June 2008, the system has been operational for three months and has reduced LPG consumption by about 43%.
• It is estimated to save approximately $150 000 - $200 000 per annum.
• Additionally, it is estimated to cut annual carbon emissions equivalent to 100 cars.