
Chicken House Ventilation Drop Hammer Ventilation Exhaust Fan 1380*1380*400mm. Automatic Drop Hammer Shutter: Gravity counterweight shutters close tightly to prevent backwind and dust ingress with no air leakage. Corrosion-Resistant Materials: Hot-dip galvanized frame and 430ss blades ensure durability in humid farm environments. High-Efficiency Airflow: Large fan blades deliver huge air volume for fast cooling and strong negative pressure ventilation. Energy-Saving Motor: Pure copper waterproof motor runs efficiently with low power consumption and low noise. Imported Quality Components: Features Japanese Mitsuboshi belts and French double-row bearings for long service life. Customizable Voltage: Voltage and frequency can be customized to meet specific requirements beyond standard 380V/220V. Easy Installation: Wall-mounted design allows for simple installation, stable operation, and minimal maintenance. Comprehensive Warranty: 1-year warranty covers free replacement of motors or key parts failing under normal use. We offer detailed installation instructions, operation tutorials and online technical guidance to help customers install and use the machines correctly. We provide a certain proportion of free vulnerable spare parts together with every order for future maintenance.