Stiftung Warentest Names Lambda EU10L the Most Efficient Air-Source Heat Pump in 2025/2026 Test
In the Stiftung Warentest 2025/2026 test, the Lambda EU10L (10 kW) received the highest rating among ten air-source heat pumps. According to Lambda, competing units consumed on average 20% more electricity. The model also ranked among the quietest and earned a "very good" (1.4) score for ease of operation.
KKA — Kälte Klima Aktuell