What heat pump sales by technology reveal about Europe’s energy transition 

07 Aug 2025

Water, air, ground-source… Taking a closer look at which types of heat pumps are selling best not only helps track market maturity, but it also gives us a sneak peek into where the next big growth opportunities might come from.  

Despite a bumpy year overall for the heat pump market in Europe, not all systems performed the same. Some technologies held strong, some surged, and others dropped.  

The frontrunner in 2024? Reversible air-to-air heat pumps, with around 875,000 units sold. These systems offer both heating and cooling, making them a hit in warmer climates and increasingly popular across Europe as summers get hotter.  

Their popularity reflects both technical improvements partly spurred by energy efficiency requirements, which have quietly raised performance standards across the board. 

On the other hand, while hot water and ground-source systems held steady through 2023, both began to contract in 2024. 

Despite the challenges, air-source systems remain the most resilient. Easier to install, increasingly quiet, and affordable, they’re expected to continue leading the transition, especially in warmer regions where cooling is a bonus. 

As policies evolve, tracking sales by technology offers a clearer picture of market maturity and where to focus next. 

See more on our new market intelligence public platform, and buy our market report (or become a member and get it for free!) for a truly in-depth dive on prices, sales, technologies, countries, building types and more.  

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