Energy and environmental consciousness requires indoor climate regulation systems to adapt to new demands. Swegon faced a challenge with their air handling units since more and more features had been added making it difficult to handle. In an iterative process in close collaboration with Swegon and groups of users, the designers focused around usability, intuitiveness and better guidance. The new user interface ensures that the system’s full potential can be exploited, staging for healthy environments while allowing the users to perform and feel professional regardless of previous experience.