Heat pump hot water heater systems can save you $100s on your bills

Learn all about heat pump hot water heaters, and how Time To Save helps you navigate the various state incentives and schemes to save hundreds on your electricity bills.

What is an Air Source Heat Pump (ASHP) water heater?

An Air Source Heat Pump (ASHP) Water Heater is a reverse refrigerator – in a nutshell.

The natural heat flow (from hot to cold body) is reversed in ASHPs. These water heaters absorb heat from ambient air and transmit it to a water storage in your home or business.

The heat pump is an electricity powered appliance that amplifies the heat extracted from outdoor air by running the refrigerant in the refrigeration cycle through evaporator coils, compressor, condenser coils (or heat exchanger) and expansion valve.

How does ASHP water heater system work?

The ASHP water heater moves heat from ambient air to water. The electricity is used in moving the heat. The refrigerant liquid flowing through the evaporator coils absorbs ambient heat. The liquid then flows through the compressor.

How does ASHP water heater system work - Time To Save VIC

HEAT PUMPS

Types of heat pump water heaters

Air source heat pumps (ASHPs)
ASHPs move heat from ambient air to refrigerant liquid to heat the water. The heat pumps are 50% more efficient than conventional electric resistance water heaters. ASHPs can be used both for space and water heating purposes. Based on its design, air-source heat pumps can further be classified into:
  • Integrated heat pumps (Evaporator coils and fan are mounted on water storage tank to form a single unit).
  • Split system heat pumps (Evaporator and fan are separate from water tank and the system will work even if the both units can be placed at different locations).
Ground source (or Geothermal) heat pumps (GSHPs)

GSHPs exploit heat from below the ground to heat/cool your home or supply hot water during winter. Temperatures remain relatively constant (below 12–40 feet) in the earth’s crust.

Compared to ASHPs, GSHPs have the drawback of higher capital and installation cost. But, lower operating and maintenance costs coupled with more durability, reliability, long lifespan and ability to work in the coldest regions of the earth make them a better alternative.

Absorption heat pumps

Instead of a vapour compression cycle, AHPs employ an Ammonia-water absorption cycle.

In this cycle, Ammonia is used as a refrigerant and water as heat absorbent.

AHPs do not use electricity as the water-ammonia mix in AHPs is heated by natural gas, solar or geothermal energy sources.

Learn how to save hundreds with heat pump hot water heater systems in NSW, VIC, QLD, Australia wide with Time To Save.

ADVANTAGES

Electric heat pump water heaters

Heat Pump water heaters outperform conventional water heaters in many ways;

  • EFFICIENCY
    Heat Pump water heaters are 50-60% more efficient.
  • CARBON EMISSIONS
    Heat Pump water heaters are very low on Carbon emissions and environment-friendly. If they are powered by Solar panels, they can even have ZERO Carbon emissions.
  • COEFFICIENT OF PERFORMANCE (COP)
    The Coefficient of performance is a number that describes the effectiveness of heat pumps, refrigerators or air conditioners. Higher COPs equate to higher efficiency, lower energy (power) consumption and thus lower operating costs. Heat pumps have a high COP of 2.5-3.5.
  • LOW RUNNING AND OPERATING COSTS
  • LOWER MAINTENANCE COSTS
  • LONG LIFESPAN
  • SAFETY
    Heat Pump water heaters are safer than natural gas fueled water heaters as they are not combustion based and don’t pose a risk of fire.
  • ELIGIBLE FOR GOVERNMENT REBATES
Heat Pump water heaters for Business

There are several factors that determine the best suitability of a Heat Pump water heater for your business. Before replacing your water heater with ASHP, you need to consider the size, constant temperature function, thermal insulation of water tank, COP, heating capacity, flow rate in case of tankless ASHP water heater and first hour rating.

Will it work in colder climates?

Even in sub-freezing temperatures, ASHP hot water heaters are the best appliance to decarbonize and reduce energy use and save money on utility bills. Modern heat pumps have a motor controller that supplies varying frequency and voltage to control the speed of the heat pump compressor. This enables the heat pumps to move heat even in freezing weather conditions.

Even in sub-freezing temperatures, ASHP hot water heaters are the best appliance to decarbonize and reduce energy use and save money on utility bills. Modern heat pumps have a motor controller that supplies varying frequency and voltage to control the speed of the heat pump compressor. This enables the heat pumps to move heat even in freezing weather conditions.

Heat pumps are more than twice as efficient as fossil fuel heating systems in cold temperatures, research shows. Even at temperatures approaching -30C, heat pumps outperform oil and gas heating systems, according to the research from Oxford University and the Regulatory Assistance Project thinktank — The Guardian.

PERFORMANCE

Factors affecting the performance of heat pumps

There is a host of factors which affect the performance and efficiency of Heat Pumps. Some of the more major ones include increases or decreases in temperature set point, stained and grubby evaporator coils, not doing regular maintenance tasks, leaks, high hot water usage, outdated shower-heads and faucet fixtures, exposed water pipes, and an a water tank that is not insulated.

It is important to ensure that your Heat Pump is taken care of in order to get the most out of your investment.

Some important factors to consider before installing your Heat Pump water heater

Before you begin the installation process, check the location and space where the pump is to be installed. Ensure that the bearing surface is level and able to bear the weight of the heat pump water heating system. Take into consideration the final position of the exhaust fan. Ensure that the circuit breaker and power cable current ratings match with the recommended current ratings. The airflow at the planned installation site is also a factor, and should be discussed with your installer. The operational noise level will be discussed with homeowner or business manager.

At TIME TO SAVE, our team of experts ensure that all conditions are optimal prior to installation, and that all points are consulted with the customer.

After the installation, our team will ensure that all the components of the heat pump are working fine, the pump system and pipe work are earthed to avoid electric shocks, the minimum inlet water pressure is maintained at the recommended level and all the mandated building and plumbing standards are being met.

We make everything easy and simple for you.
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