Since autumn 2025, more than 12,500 people have come to the Wärmepumpen-Infotag, the Heat Pump Info Day, in towns and cities across Germany. On average, over 600 guests attend each evening. In Würzburg in October 2026, more than 1,100 filled the hall.
The format was conceived and built by Anja Floetenmeyer-Woltmann, member of the European Commission’s Heat Pump Accelerator Platform, EU Climate Pact Ambassador and member of the Heat Pumps Watch advisory board. Her approach starts where most homeowners already are: open to the heat pump, with practical questions about their own house.
The municipality invites, the experts answer
Each Info Day is hosted by a municipality. For the 2026/2027 season, 25 host municipalities were selected from around 60 applications. The town provides the venue and invites its residents through its own channels; admission is free. The evening opens with a welcome from the town, followed by two expert talks on stage. Then comes the “advice marathon”: guests take their questions to the stands of manufacturers, local installers and energy advisers, all in one room.
All events are strictly brand- and manufacturer-neutral. The series is supported by companies such as Buderus, Daikin, LG, Stiebel Eltron, Viessmann, Weishaupt and Wolf, as well as Brötje, Midea, Mitsubishi, NIBE, Panasonic, Vaillant and Wattgeht, in cooperation with the German Heat Pump Association (BWP).
Designed for the next step
Anja builds each evening as a decision architecture: which considerations lead to a heat pump, which subsidies are available, and what the concrete next step is. Her stage partners include Dr. Marek Miara, founder of Heat Pumps Watch and member of the EHPA Board, who spent more than two decades researching heat pumps in real-world operation at Fraunhofer ISE. On stage he explains which heat pump suits which house, why the seasonal performance factor matters and when it pays to replace radiators. This season the tour also covers multi-family buildings.
“Hardly anyone still asks whether to get a heat pump. Almost everyone now asks: how do I do this in my own house?”Anja Floetenmeyer-Woltmann, initiator of the Heat Pump Info Days
Measured results
Every evening is evaluated with a questionnaire; 4,943 have been collected so far. Across both series, agreement with the statement “A heat pump can work for my house” rose from 77 to 93 percent over the course of the evening. Afterwards, 92 percent planned at least one concrete step, on average more than three.
Anja presented the method and the evaluation at the IEA Heat Pump Conference 2026 in Vienna. The paper “Scalable Strategy for Heat Pump Adoption: Community-Based Events with Behavioural Design” covers the first ten events (5,750 participants, 2,542 survey responses) and describes how the format moves people from intention to action, and how it can be repeated from town to town. The figures above show the current total across both seasons.
More: waermepumpen-infotag.de (opens in a new window) · Contact: Anja Floetenmeyer-Woltmann, floetenmeyer@waermepumpen-infotag.de