Does the CFM rating include entrained air movement?
Yes. The AMCA-240-96 Test Standards used by Tempest to certify our Positive Pressure Ventilation Performance (measured by “CFM rating”) takes into consideration the “entrained air” moved by the forward velocity of the power blower as “set back” from the entry way into the test chamber. This test standard was developed by the PPV manufacturing industry in conjunction with AMCA to allow any fan or blower or air mover, of any design – whether caged or shrouded, prop blades or turbo blades, centrifugal or vane axial, gas or electric, etc. to be tested. The CFM ratings as the result of AMCA #240-96 certification include ALL air, forced or entrained, forced “through the door and coming out the back door” of the test chamber.
