Air-to-water vs ground-source heat pumps: which is best?

So you’ve decided to invest in a heat pump. After looking at all the options, you’ve narrowed it down to two choices: air-to-water or ground-source. In this article, we look at the pros and cons of each to help you towards that final decision.

The main difference between ground-source and air-to-water heat pumps is simply where they get their energy from.

An air-to-water heat pump absorbs heat from the air, while a ground-source heat pump draws energy from the ground.

Efficiency and sustainability

If you’ve decided to switch to a heat pump, you’ll be aware of the cost, efficiency and sustainability benefits of this form of renewable energy.

This is true of both air-to-water and ground-source heat pumps. Both offer a sustainable alternative to fossil fuel heating systems. Both operate around 70-80% on renewable energy, while the remaining power input comes from electricity.

While they work similarly in that respect, ground-source heat pumps are more suitable for places with longer, more severe winters, while air-to-water heat pumps maintain their efficiency in more moderate climates.

Air-to-water and ground source heat pump installation

One of the main differences between an air-to-water and a ground-source heat pump is their installation. An air-to-water heat pump comprises an indoor and an outdoor unit. A ground-source heat pump has an indoor unit and an outdoor heat exchanger, installed in the ground.

The latter requires plenty of outdoor space with the right ground conditions. They are generally better suited to new build homes or to upgrade an existing ground-source heat pump.

Air-to-water heat pumps are more straightforward to install and come in low-, mid- and high-temperature varieties, making them ideal for any type of home, from a new build to an older property.

They are also a great replacement solution in homes that use fossil fuel systems.

What they have in common, where installation is concerned, is the emitters they connect to. Installing new or replacement emitters, such as radiators or underfloor heating, involves a similar process for both air-to-water and ground-source heat pumps.

Installation costs

The cost of a heat pump varies by type. Because of the additional logistics, a ground-source heat pump is more expensive to install than an air-to-water heat pump. There’s also the cost of any new or replacement emitters that need to be bought and installed.

As well as reduced energy bills, a heat pump is easier to service and maintain. Having a renewable energy heating system also increases the value of your home.

ty you live in, your budget and your needs.

Talking through the options with a qualified installer will help you reach a decision on the best solution for you.

In conclusion

Both air-to-water and ground-source heat pumps offer many benefits in terms of environmental impact, efficiency and long-term savings.

Which is right for you will depend on several factors, including the type of property you live in, your budget and your needs.

Talking through the options with a qualified installer will help you reach a decision on the best solution for you.