I am looking to purchase a fan with high velocity. I am trying to make solid data driven decision based on specs. I found that most fan's of the 20" diameter variety are around 3000 CFM; however found one that is stated at 6000 CFM (2.83 m^3/s) with 162 watt and 1450 RPM. Link to fan: https://www.homedepot.com/p/Commercial-Electric-20-in-3-Speed-High-Velocity-Floor-Fan-SFC1-500B/302845111
I am using equation efficiency = dP*flow rate/Power and using 50 Pa dP (not sure what is proper value there, but it is giving me reasonable efficiency ratings so I normalized to that) I am coming to an efficiency of 87% for this fan.
It seems like the rest of marketplace is more like 30 to 50% efficiency (again using the assumed dP of 50 Pa).
Can someone help me understand if this is possible efficiency for a floor fan or too good to be true? Am I using correct equations and dP estimate. This is not my area of expertise by any stretch, but from what I have found the efficiency seems implausible.