This Japanese Industrial Standard specifies the test and inspection method for centrifugal fans, axial flow fans, mixed flow fans, etc. of about less than 1.3 pressure ratio performed at works using air at room temperatures and normal pressures. In the case of the test and inspection for fans having a special structure or fans to be used under special gases or other special coditions, the agreement between the parties concerned with delivery shall be made and this Standard shall suitably apply by accepting or refecting or supplementing it.

ISO 5801:2007 - Identical