AC Electronically Commutated (EC) Centrifugal Fans Market Forecast to 2030 - COVID-19 Impact and Global Analysis by Diameter Size (Below 250mm, 251mm-400mm, 401mm-550mm, and 551mm-700mm), Application (Air Conditioners, Refrigerators, Ventilation systems, Electronic Cabinets, and Others), and Power Range (Below 0.5kW, 0.5-3kW, 3.1-5kW, and Above 5kW)