Cler

About Cler

Cler is a Swedish deep-tech company revolutionizing air purification with its proprietary Perpetual Filtration Technology (PFT). Founded in 2020, the company spun out of more than two decades of centrifugal separation research expertise from Alfa Laval, where R&D and Innovation Directors advanced the technology to remove dry airborne particles in addition to liquid droplets. The firm has operated full-time since 2021 with the mission to reduce the global reliance on disposable air filters.

Cler's core business revolves around providing a maintenance-free, self-cleaning, and energy-efficient air cleaning solution for demanding commercial and industrial environments. The business model focuses on eliminating the total cost of ownership associated with traditional filtration systems by removing the need for filter replacements, manual handling, and disposal costs, thereby reducing waste and CO₂ emissions. The company targets a wide range of sectors, including commercial kitchens, HVAC systems, data centers, and industrial facilities such as manufacturing, energy, and chemical processing.

The company's patented PFT utilizes high centrifugal forces (up to 5,000 g) combined with a unique lamella disc design to separate particles down to PM0.5 from the air based on weight, without using traditional filter materials. This process ensures continuous performance without the pressure drops and energy consumption increases typical of clogging filters. A key feature is the automated self-cleaning system, which uses a minimal amount of liquid to rinse collected particles, eliminating downtime and the need for manual maintenance. This technology is designed to be retrofitted into existing ventilation systems, offering a scalable solution that protects equipment and improves air quality.