Thread Number: 33426  /  Tag: Recent Vacuum Cleaners from past 20 years
Symplicity Symmetry Airflow Losses
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Post# 364319   12/29/2016 at 14:50 (2,645 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. Based on the massive airflow loss at the rug plate, I am rather disappointed and confused at the performance of this cleaner.

From the base of the machine through the very long hose to the head assembly, there is a loss of 114-97 = 17 CFM. From the hose connection to the nozzle, there is a loss of 97-42 = 55 CFM.

Total airflow losses from the main body to the power nozzle (held at a 45 degree angle to the floor) is 114-42 = 72 CFM or about 63% of the original airflow.

Last note: the rug plate opening is slightly larger than average (about 26 square inches), but CFM density is far, far below average, about 1.6 CFM/Sq. In. If you ever wondered if this expensive 12 Amp beast was capable of deep cleaning, I would have a hard time recommending it due to the massive airflow loss experienced at the plastic rug plate.

Bill


Post# 364320 , Reply# 1   12/29/2016 at 15:01 (2,645 days old) by wyaple (Pickerington, OH)        
Additional Rug Plate Comments

wyaple's profile picture
So I've discovered two things that might explain the massive airflow loss of the Symmetry. The first I've mentioned before in another post. There appear to be three, inch long airflow relief holes on the top front of the rug plate. That'll definitely account for some performance drop. See pic #1.

The second, possibly larger concern is the lack of a seal in the rug plate. It doesn't appear to be missing, rather it appears that Tacony never designed this model to have one. See pic #2.

Tom G.: If you have any comments from the Tacony engineers, I'd love to hear them.

Bill


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