The impressive building is considered the largest all-wood office building in Austria. The dominant building materials, wood and glass, emphasize the company's connection to nature as well as its transparency. Solar heat and daylight are optimally utilized for the 140 employees through the circular, glass atrium at the center of the building and distributed throughout the individual office areas. “Our building impressively demonstrates how important sustainable resource use is to us. Unfortunately, the indoor climate wasn't quite as convincing at the beginning,” recalls Dr. Stefan Trzesniowski, safety specialist at the Austrian Federal Forests (ÖBf). Measurements of the relative humidity immediately after moving in in 2002 showed values ​​well below 20 percent. Since employees increasingly complained of dry mucous membranes, irritated eyes, and respiratory problems, occupational physician Dr. Sigrid Kölbl-Klufa recommended finding solutions to increase the humidity. Dr. Trzesniowski was tasked with evaluating various options for additional humidification together with the works council and the management board: “Our ideas ranged from 5-meter-high trees in the atrium and open air-conditioning fountains to small portable humidifiers in each office. A lack of controls, high maintenance costs, and hygiene concerns led to the rejection of all proposals.” When the possibility of humidifying the air in the air conditioning system was deemed too technically complex and maintenance-intensive, the Austrian Federal Forests (ÖBf) finally opted for a new approach: direct room humidification.

After nearly 13 years of reliable operation, when the Austrian Federal Forests (ÖBf) had the option of upgrading their humidification technology, the board immediately approved the replacement investment in a new system from Condair Systems. The new Draabe NanoFog Sens humidifiers are significantly smaller and quieter than their predecessors. The fine mist, which is sprayed directly into the rooms as needed, is therefore barely visible. Eighteen NanoFog Sens humidifiers with a maximum total output of 27 liters per hour are installed in the ÖBf's office areas. For Dr. Trzesniowski, the greatest advantage of the new technology lies in the water treatment: “The high-pressure pump and reverse osmosis system are now housed in just one container instead of two. This significantly reduces maintenance, space requirements, and energy consumption.”

Looking back on the past 14 years, Dr. Stefan Trzesniowski considers the additional humidification system just as indispensable as heating: “The year-round optimal humidity is a noticeable factor in the well-being and health of our employees. The humidification system is fully accepted, not least because it has been working flawlessly from day one for the past 14 years.”