Forward-curved multi-blade narrow-rim impeller with precision dynamic balancing; Y2 aluminum alloy die-cast motor,insulation class For above,stable long-term operation in environments up to 12o℃; modular design with detachable mounting feet for flexible installation.Ventilation and equipment cooling for telecommunications, electric power, electronics, geology, coal mining, shipbuilding, and papermaking; plastic machinery,printing, packaging, film blowing, drying equipment, cooling systems, and general industrial ventilation.