Thread Number: 33572  /  Tag: Recent Vacuum Cleaners from past 20 years
Hoover Windtunnel 2 Pet Airflow Losses
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Post# 365596   1/24/2017 at 19:17 (2,619 days old) by wyaple (Pickerington, OH)        

wyaple's profile picture
The first two measurements were easy to get, the last one (CFM at the nozzle) required me to build an airflow box. I think this pic should easily illustrate where and by how much CFM is lost in this machine. I think this is typical performance from an inexpensive cyclonic bag less cleaner.

From the base of the machine through the cyclones, there is a loss of 124-66 = 58 CFM. From the cyclones to the nozzle, there is a loss of 66-52 = 14 CFM.

Total airflow losses from the canister base to the power nozzle (held at a 45 degree angle to the floor) is 124-52 = 72 CFM or about 58% of the original airflow.

Last note: the rug plate opening is fairly typical (about 26 square inches), but CFM density is well below average, about 2.0 CFM/Sq. In. If you ever wondered if this inexpensive 12 Amp beast was capable of deep cleaning, I would argue it probably wouldn't be, even with stiff bristles on the brush roll.

Bill



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