How Do I Choose the Right Size Hot Water Heat Pump for My Home?

Written By EnergyLabs  |  Hot Water Heat Pumps 

Choosing the right size hot water heat pump for your home can be tricky – but don’t worry, it’s not impossible. To get started, you’ll need to take a few measurements and do some calculations. Once you’ve got the numbers sorted out, you’ll be able to choose the perfect pump for your home and enjoy hot water on demand.

First thing’s first: measure your hot water tank. You’ll need to know its capacity in litres as this will determine what size heat pump you need. The bigger the tank, the bigger the pump!

Next, calculate how much hot water you and your family use per day. Consider things like dishwashing, laundry, showers, baths and other activities. Generally speaking, a family of four will use around 375 litres of hot water per day – but yours may be higher or lower depending on your lifestyle and habits.

Now it’s time to figure out what sort of temperature rise you’ll need from your pump. This is calculated by subtracting the temperature at which your cold water enters from the temperature at which you want your hot water to leave. For example, if cold water enters at 10 degrees Celsius and you want hot water leaving at 50 degrees Celsius then you’d need a 40 degree temperature rise from your pump.

Finally, add everything up! Multiply your daily usage (in litres) by the required temperature rise (in degrees Celsius). This will give you an indication of how powerful of a pump is needed for your home – it should be able to produce more than this amount each day in order to provide enough hot water for all of your needs.

Remember that choosing an undersized heat pump won’t provide enough hot water for all of your needs – so it’s important that you get this measurement right! If in doubt, consult with a professional who can help make sure that you choose just the right size for your home’s needs.

Free Delivery to Australian Capital Cities*
Flat Rate Delivery of $200 Outside of Capitals