How does a hot water heat pump work?

If you’ve ever wondered “what is a hot water heat pump?” or “how does a hot water heat pump work?”, the simplest way to explain it is by saying, “it works like a fridge, but in reverse.” But what does that really mean? Let’s break it down into four easy steps…

Let’s break it down into four easy steps:

• one. The heat pump’s fan draws in air from outside.
• two. Heat is extracted from the air and transferred to a coil.
• three. The coil wraps around the water tank, heating the water as it circulates.
• four. This process repeats until the water is nice and hot.

It sounds pretty straightforward, right? But if you’re looking for something a bit more technical, we’ve got you covered.

A deeper dive into how a hot water heat pump works

• First, the fan pulls in air from outside into the evaporator.
• In the evaporator, a refrigerant fluid absorbs the heat from the air, causing it to turn from a liquid into a gas.
• This gas is compressed, making it hotter and more pressurised.
• The now hot gas flows through a coil wrapped around the water tank, transferring heat to the water.
• As the refrigerant loses heat, it cools down and changes back into a liquid.
• The cooled refrigerant is passed through an expansion valve, where it depressurises and cools even more before heading back to the evaporator to start the process again.

Still with us? No worries if it feels a little complicated. Our Product Specialist, Adam, explains it even better. You can check out his video below.

Watch Product Specialists Adams video explainer

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If you’re interested in having one of our hot water heat pumps installed, just tap the button below to fill in your details, and one of our trusted installers will be in touch with more information.

By the way, hot water heat pumps are an energy efficient way to heat your water, saving you money and reducing your carbon footprint. Win win!

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