Stiftung Warentest Extends Heat Pump Test: Top-Rated Viessmann Vitocal 250-A Continues to Lead Field

2024-08-10
Stiftung Warentest has extended its heat pump test. The Viessmann Vitocal 250-A is still in a leading the field with its top rating from October 2023 - especially in the important evaluation criterion "Energy efficiency and environmental properties when heating".
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