Key features: 1.Aluminum airfoil propeller: move high volumes of air with maximum thrust and maximum efficiency. 2.Galvanized casing: continuously welded to prevent air leakage. 3.Motor plate: securely welded to fan inner tube to improve rigidity and prevent vibration. 4.Silencers: available in two options short (one diameter length) and long (two diameter length). 5.Direction vanes: available on select models to direct airflow. 6.Smoke extraction: 300â°c for 2 hours (f300 certificate 370-cpr-1745) and 400â°c for 2 hours (f400 Certificate 370-cpr-1848) available on select models. Tested and certified in accordance with En12101-3:2002 7.Iec rated motors: 50 hz or 60 hz motors available, in single or two speed, vfd rated, and eff2 or Ie2 efficiency 8.Amca air and sound certified Key considerations: 1.Standards: apply relevant codes such as nfpa, ibc, ashrae, and european standards 2.Required air changes: optimize air flow for normal and fire modes 3.Sound: reduce sound levels to acceptable limits for tenants 4.Control strategy and sequencing: define sensor to fan correlation and system response 5.Accessibility and aesthetics: advise on placement of ramps, wall openings, and pedestrian exits 6.Greenpark components: reduce cost and optimize safety with selection and placement Typical ventilation applications area include: 1.Enclosed / basement air and smoke ventilation 2.Enclosed / basement car park air and smoke ventilation 3.Tunnel ventilation 4.Linear air ventilation, in industries etc 5.Ductless ventilation system