Common Models and Sizes Fujika HFM-1209Q (90 cm size):✅ Includes 2 fans for regular air distribution. Airflow rate up to 1600 cubic meters per hour. Suitable for medium and small entrances and doors in shops. [1, 2] Fujika HFM-1212Q (120 cm size):✅ Includes 2 fans to cover wider entrances. Stronger airflow rate up to 2200 cubic meters per hour for higher thermal insulation. [1, 2]