The Smart-Duo combi boiler received the Plus X Award 2025 in the categories Innovation, High Quality, Design, Ease of Use, Functionality and Ecology. This once again emphasises the important role of Hargassner heating technology in the field of innovative and sustainable heating solutions.

The Plus X Award
The Plus X Award is recognised as one of the biggest innovation awards in the fields of technology, sport and lifestyle. It honours brands and products that stand out due to their special quality and innovative strength. Solutions that fulfil at least one so-called “Plus X” factor, for example through advanced technologies, outstanding design, user-friendly concepts or ecological benefits, can be awarded a prize. An independent jury of experts from over 90 sectors assesses the products submitted, providing consumers with valuable guidance when purchasing high-quality and future-orientated products.
The Smart-Duo impresses in the following categories:
Innovation
Products such as the Smart-Duo, which were honoured with the Plus X Award in the “Innovation” category, are characterised by genuine innovative strength and represent the latest state of the art. Pioneering technologies not only ensure maximum efficiency, but also a long service life.
High quality
The Smart-Duo fulfils criteria such as durability, first-class workmanship and reliability. This ensures a future-proof and long-term heating solution.
Design
The Smart-Duo impresses with its modern and appealing design, which combines a compact look with functionality. It has a timeless look and is the ideal choice both visually and technically.
Ease of use
Modern heating solutions should work efficiently and be easy to use at the same time. This is precisely where the Smart-Duo impresses with its ease of use. Thanks to intuitive control units and simple installation, users can set the heating functions to suit their individual requirements.
Functionality
For a product to impress consumers with its technical innovation and high performance, it needs more than just state-of-the-art technology: well thought-out operating options are crucial. It is precisely this user-friendliness that makes the Smart-Duo a Plus X Award-winning product.
Ecology
Saving energy today not only helps to protect the environment, but also helps consumers to reduce costs. Just as important – albeit less visible – is the reduction of appliance emissions such as noise, dust and pollutants. The Smart-Duo shows that innovation and ecological responsibility go hand in hand.





