"Building biology is part of the overall concept of BIO HOTELS," explains organic hotelier Walter Theiner of Biorefugium theiner’s garten: "We want to offer our guests a holistically healthy and relaxing vacation. This does not stop at eating and drinking." Building biology describes a particularly sustainable construction method that is intended to have a positive influence on the well-being and health of people and nature. This begins with the choice of building materials: natural materials that are as low in pollutants as possible, such as wood and natural stone, are preferred for biological construction. This protects the environment and creates a natural indoor climate.