Aw compared to cfm

[dogdad]

Saw an article on converting AW to cfm...a Fein has 151 cfm and a dyson upright has 245 AW...converting the Fein to AW comes up to 1742... Doesn't sound correct...someone correct me if I'm wrong...that's a huge difference if I'm correct..here's the article/equation:
Air Watts are another type of measurement for the suction power. This refers to the amount of Watts used by the machine to carry a unit of air through an opening (usually the vacuum’s nozzle). This is my favorite measurement, because it’s more consistent to the reality of what needs to be quantified. If you know the CFM and the Water Lift (also called sealed suction, measured in inches of water list, when there is a zero nozzle opening), you can calculate the Air Watts size by using the formula:

Air Watts = 0.117254 * Airflow (CFM) * Water lift (inches of H2O)

The Fein turbo 1 has 151 cfm and 98.4 water lift

 

[speed bump]

Air watts is a made up number, we have a similar way of rating down hole motors in our industry (dead head torque x free spin rpm). At dead head you are just holding the water so no power is being exerted on the column of water.

Beyond that the fein is built to pull a lot of suction and the Dyson uses as agitator to to help clean. Different vacuums for different purposes.