energy-saving cast iron IE2 high efficiency motor. IP55, F-class, B-rise. S1 duty ... high efficiency motor. The efficiency index is according with European:IE2 and Australia LEVEL 1B high efficiency standard.IP55, F- ... Institute and CQST. Its efficiency indicators are in line with IE2, EFF1 of CEMEP-EU and High Standards of Australia( ... 40C. Altitude less than 1000m. High efficiency cast iron motor (IE2)