What are heat pump water heaters?

A heat pump water heater is a type of water heater that uses a compressor and refrigerant to extract heat from the surrounding air and transfer it to the water in the tank. This process is much more energy-efficient than traditional electric or gas water heaters because it doesn't rely solely on electricity or fossil fuels to heat the water. Instead, it uses the heat from the air, which is a renewable resource.

If you live in Australia (Victoria), the government is installing energy-efficient hot water systems for free.

Here are some of the key features and benefits of heat pump water heaters:

Heat pump water heaters are significantly more efficient than traditional electric water heaters and can save the average household up to $330 a year on electric bills according to the Department of Energy's Energy Star website. That adds up to nearly $3,400 over the average life of a heat pump water heater.

Energy Efficiency: Heat pump water heaters are much more energy-efficient than traditional electric or gas water heaters. According to the U.S. Department of Energy, they can be up to 300% more efficient than electric resistance water heaters.

Lower Operating Costs: Because HPWHs use less energy to heat water, they can help you save money on your monthly utility bills.

Environmentally Friendly: By using the heat from the air, HPWHs produce fewer greenhouse gas emissions than traditional water heaters.

Longer Lifespan: HPWHs can last up to 15 years or more, which is longer than traditional water heaters.

Improved Performance in Cold Spaces: HPWHs work well in cold spaces, unlike traditional water heaters, which can struggle to heat water in cold environments.

Easy to Install: HPWHs can be installed in the same space as traditional water heaters and don't require any special venting.

Rebates and Incentives: Many utility companies and government agencies offer rebates and incentives for installing energy-efficient appliances like HPWHs.

There are a few things to consider before purchasing a heat pump water heater. These include:

Cost: HPWHs can be more expensive upfront than traditional water heaters, but the energy savings can make up for the initial cost.

Space: HPWHs require space around them to draw in air for the heat pump. Make sure you have enough space for the unit.

Noise: HPWHs can be louder than traditional water heaters due to the compressor and fan.

Climate: HPWHs work best in warmer climates where the surrounding air is warmer. If you live in a cold climate, you may need to supplement your HPWH with another heating source.

How does it work?

A heat pump water heater works by extracting heat from the air and transferring it to the water in the tank. Water heater system like ‘air source’ contains a power cable, a fan to suck ambient air and push it through evaporator coils filled with refrigerant to absorb the heat, a compressor to compress the refrigerant liquid and increase its temperature, evaporator coils, condenser coils to deliver the heat to water, storage tank to store the heated water, cold water inlet, hot water outlet, and an expansion valve to reduce pressure (and temperature) of the refrigerant liquid.

Can heat pumps work in cold climates?

These systems are capable enough for performing in bone-freezing conditions, even if the temperature drops to 25°C degrees thanks to advanced refrigeration technology. Heat pumps we install under the VEU program are modern and use lower boiling point refrigerant liquid, and such refrigerants draw heat from sub-zero ambient temperature and continue to flow through the evaporator coils of the heat pump.

Heat pump water heaters are a great choice for anyone looking to save money on their energy bills, reduce their carbon footprint, and enjoy reliable hot water.