Air curtains Thermozone Technology Thirty years of air curtain development in the demanding Scandinavian climate has given us a unique platform to create air curtains with optimal door protection. Thermozone air curtains are optimized in: * Airflow geometry * Performance * Sound level Design Frico cooperate with leading architects and product designers to create today's aesthetic products. Air curtains for every application Frico offers a wide range of options with or without heat and for all openings from service hatches to air craft hangars.