WindowMaster is a Danish clean tech company that supplies sustainable indoor climate solutions based on intelligent natural and mixed mode ventilation as well as heat and smoke ventilation solutions. The solutions are for commercial use, primarily in the following six segments: 1) Office, 2) Education institutions, 3) Cultural buildings, 4) Shopping centers, 5) Hospitals and 6) Sports facilities. In 2015, WindowMaster was acquired by the current majority shareholder and CEO, Erik Boyter, in a management buy-in. Today, the company is a global company with sales subsidiaries in Denmark, Germany, Ireland, Norway, United Kingdom, United States, and Switzerland. The company has been listed at Nasdaq First North in Denmark since October 2020.