A leading supplier and manufacturer of

Products for a better indoor environment

Our ventilators regulate (open/close) in relation to the outdoor temperature, which gives optimum ventilation in rooms and building during all seasons. We also supply unique products such as drying room equipment for multifamily buildings and patented air change devices for premises where ventilation is only required periodically, e.g. in meeting rooms.


Our products

The products are Swedish made and have long service life. Our sales are in Northern Europe with Sweden as the main market. Liljengrens has long experience in energy-efficient ventilation approach and develops climate products for the future.

Business concept

Our business concept is to develop and market product and concepts for optimum ventilation. Our policy is that prevailing laws of nature shall be the guide for good health, economy and the environment.


We provide a 10-year warranty for our thermostat bulb.

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