... zinc phosphate and polyester powder coating. Superior corrosion resistance4, High-efficient multiple intake and exhaust noise reduction, good ventilation ... noise reduction technology & new sound-absorbing materials (Special high-temperature flame-retardant sound insulation sponge)6, With outstanding low ... , BS 5000, VDE 0530, NEMA MG1-22, IEC34, CSA C22.2-100 and ASB59 Control panel: Simple view dial ...