Application: Rooftop exhaust, explosion-proof exhaust, smoke removal Volume range: 600 ~ 50000 m3/h Static pressure range: 100 ~1000Pa Installation type: Rooftop curb mounted) Product feature: AMCA certified sound and air performance; �Wind-surferII� type backward inclined centrifugal wheel, high efficiency, low noise Wheel balancing level G2.5 Elegant appearance matched with the modern architectural design All Aluminum construction, light and high intensity National fire fighting certificate