Casing and impellers are made of aluminum alloyand have excellent features on mechanic strength RB series Side Channel Blowers are designed to comply with the safety requirements of IEC / UL / CSA and have attained their Type Approval. Meet CE Norm: 89/336, 73/23, EN60204-1, EN50081-2, EN50082-2 Degree of protection: IP54 Insulation class: F (155 °C) Voltage range: 1 Phase, 100-120 / 200-240 Volt 3 Phase, 200-240 / 380-440 Volt 3 Phase, 230-460 Volt Frequency: 50 / 60 Hz Installation: any aspectNeuer Text