High energy efficiency with seamless copper tube mechanically expanded to aluminum fins.High reliability and fire resistance by galvanized steel fan blade and shell.Easy installation by configuration of ABS fan blade and shell.(Optional)Space saving thanks to compact design and unit body thickness is only 225mm.V shape drain pan design guarantees the highest drainage efficiency.Quiet operation thanks to DlDW forward curve centrifugal fan and NSK axis.Optional static pressure 12-30/30-50Pa meets wide application requirements