Hammer fans are used as exhaust fans in close house broiler chicken coops. This Hammer Fan has a pendulum-like part that functions to open the shutter on the blower Made of galvanized iron and can be used in cages with sizes in the range of 40-60 meters. This blower uses a Siemens 3 Phase dynamo 50” Box Fan Size: - Dimensions: 138cm x 138cm x 45cm -Weight: 90kg Motor Nosch 1 Phase 1.5 HP specifications: - Volts: 220 - Power: 1.1 kW - Hz: 50 -Current: 7.4A - Speed: 1400rpm