Together with his childhood friend, Andreas, Hans founded, Birdie®, which is an alternative indoor air quality monitor. In 30 days they raised $500.000 on Kickstarter and sold the product to customers in 68 countries. Since then, Birdie® has won +10 international design- and innovation awards, received VC-investment, been featured in +150 articles and can be found on the shelves at retailers such as Louisiana Museum of Modern Art & Vitra Design Musem.