Poultry/ Greenhouse/ Industrial Exhaust fan 54 inches , Euroemm EM50, Exhaust fan Munters Fan housing and venturi made of strong galvanised sheet-steel Shutters are made of pressed gal-vanised steel in order to ensure highest strength Each motor is individually tested for 100% quality control Central hub and v-belt pulley aremade from die-cast aluminium Propeller is statically and dynamically balanced Shutter bearings are maintenancefree Patented centrifugal system permits a fully and firm opening of the shutter Shutter is opened by rotating weights placed over centrifugal system arms Shutter opening is not affected by the weight of dust deposited on shutter blades A powerful couple of springs keep the shutters firmly closed when the fan is not operating Every fan is individually checked for quality.