Heat Pump Hot Water in Australia: Key Figures

Your Home puts water heating at about a quarter of the energy an average Australian household uses.

Source: Your Home, the Australian Government guide to sustainable homes (EnergyConsult, 2022). Read 4 November 2026.

The department describes water heating as the second largest segment of household energy use. The share differs from home to home, which is why it gives a range.

Source: energy.gov.au. Read 4 November 2026.

Before rebates the modelled range is $3,722 to $5,981. These are modelled estimates, not quotes and not averages of quotes.

Source: PumpSwap modelled price reference, 1,534 suburbs. Last checked 6 April 2026.

Victoria averages $2,176 to $4,270 after rebates. Australian Capital Territory averages $3,376 to $5,865.

Source: PumpSwap modelled price reference. Last checked 6 April 2026.

The discount comes from small-scale technology certificates and is usually taken off the quote by the installer.

Source: certificate counts from the Clean Energy Regulator register of heat pump models. How the federal discount works. Rebates checked 28 October 2026.

This is every Victorian scheme at its maximum plus the federal discount at its maximum. Most households qualify for less than the full stack.

Source: Victorian heat pump rebates, each scheme at its maximum. Rebates checked 28 October 2026.

Modelled for 200 litres of hot water a day at 31c per kWh, across the 34 models PumpSwap tracks. A standard electric storage tank heating the same water at the same tariff models at about $1,316 a year. An electric tank on a cheaper off-peak tariff costs less than that: see controlled load versus a heat pump.

Source: PumpSwap model, from the efficiency figure of each system. Heat pump running costs. Brand data updated 12 October 2026.

A standard electric storage tank needs about 11.6 kWh a day for the same water. The difference is the efficiency figure in the next box.

Source: PumpSwap model, heating 200 litres from 15C to 60C. Brand data updated 12 October 2026.

COP is the coefficient of performance. A COP of 4 means four units of heat for each unit of electricity.

Source: figures published or listed for the 34 models PumpSwap tracks. Every brand compared. Brand data updated 12 October 2026.

The quietest published figure belongs to Reclaim Energy and Sanden. Dux publishes no sound level for the models listed.

Source: figures published or listed for each model. PumpSwap has not measured them. Sound level by brand. Brand data updated 12 October 2026.

The heat pump unit itself is covered for 2 to 10 years, depending on the brand. Tank and heat pump cover are often different lengths, so check both.

Source: the published warranty of each maker. Warranty by brand. Brand data updated 12 October 2026.

Tank sizes run from 150 to 340 litres. Modelled installed prices before rebates run from $2,500 to $8,500.

Source: PumpSwap brand comparison. Brand data updated 12 October 2026.