Chris Davidson, CTO at Genius Energy Lab
Despite significant progress in low-carbon heating, misinformation continues to slow ground source heat pump (GSHP) adoption. Heating accounts for 37% of the UK’s carbon emissions, making efficient alternatives essential for hitting our net zero targets. In 2024, heat pump installations hit a record high, with MCS data showing over 39,000 new systems installed, bringing the UK’s total to more than 275,000. However, outdated myths persist, prompting the government to launch a campaign to combat disinformation around heat pumps.
Ground source heat pumps deliver unmatched efficiency, achieving up to 400% efficiency, far outperforming air source heat pumps (200-234%) and gas boilers (90%). But why, if they are proven to be the best heating and cooling energy source we have, are they not being adopted at a faster rate? Having worked extensively in GSHP design, I’ve seen how persistent myths shape perceptions about this simple technology. Here, I tackle some of the most common concerns and explain why it’s time for energy professionals to rethink GSHPs.
Myth 1: Ground Source Heat Pumps Are Too Expensive
One of the biggest concerns surrounding GSHPs is their perceived high upfront cost. While the initial investment can be more than conventional heating systems, this view ignores the long-term financial and environmental benefits. Lower operating costs, reduced maintenance, and improved energy efficiency mean GSHPs have a lower lifetime cost than legacy energy sources. Additionally, new funding models and incentives, such as grants and third-party ownership structures, are making GSHPs more accessible.
Myth 2: Ground Source Heat Pumps Are Only Suitable for Certain Buildings
A common misconception is that GSHPs are only effective for homes or new-build projects. In reality, they are used in a wide range of settings, from schools and hospitals to commercial buildings and industrial sites. They are at their most efficient and cost-effective when integrated into district heating schemes to provide efficient energy distribution across entire communities.
Flexible design options, including horizontal trenches and vertical boreholes, allow GSHPs to be tailored to different locations and site conditions. Even in dense urban environments, they can be deployed effectively with careful planning.
Myth 3: Ground Source Heat Pumps Are Difficult to Implement
The assumption that GSHP projects are high-risk often stems from concerns about installation complexity. While planning and site assessments are necessary, advances in drilling techniques and modular system designs have made implementation more adaptable and straightforward.
Our partner Kensa Utilities’ ‘Heat the Streets’ initiative is a prime example of how GSHPs can be deployed in residential areas with minimal disruption. By retrofitting existing housing stock, this project has helped reduce heating costs and carbon emissions, demonstrating that GSHPs can be a practical solution even for older buildings. With the right expertise, GSHPs can be integrated smoothly into both new and existing developments, offering one of the most stable and reliable heating solutions with minimal risks.
Myth 4: Ground Source Heat Pumps Don’t Work Well in Cold Weather
GSHPs perform well even in extreme cold and are widely used in some of the coldest regions across Northern Europe and North America. Unlike air source heat pumps, which rely on fluctuating outdoor air temperatures, GSHPs extract heat from the ground, where temperatures remain stable year-round. This ensures consistent performance even in extreme winter conditions.
Myth 5: Ground Source Heat Pumps Require Frequent Maintenance
Another misconception is that GSHPs need regular and costly maintenance. In reality, GSHPs have fewer moving parts than traditional boilers, leading to lower wear and tear. Once installed, they require minimal upkeep beyond routine system checks.
The GSHP unit itself typically lasts 20-25 years, while the ground loop array is a long-term asset with a lifespan of over 100 years. Compared to air source heat pumps (ASHPs), which generally last 12-15 years due to exposure to the elements, and gas boilers that often require frequent servicing and repairs, GSHPs offer a low-maintenance, long-lasting, and highly efficient heating solution.
The Bigger Picture: A Decarbonised Future
GSHPs are the most efficient and future-proofed heating solutions available today. As policy and regulation continue to drive the move away from fossil fuel heating, the need for scalable, low-carbon alternatives is only growing.
For energy professionals, the question is no longer whether GSHPs are viable, but rather how we can accelerate their adoption. By addressing these misconceptions head-on, we can help ensure that GSHPs play their rightful role in the UK’s journey to net zero.
