Thread Number: 39573  /  Tag: Recent Vacuum Cleaners from past 20 years
A flawed test of series vs parallel setups.
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Post# 419746   2/9/2020 at 15:50 (1,509 days old) by Blackheart (North Dakota)        

blackheart's profile picture
I've been wanting to try this out for a while. since I have two Oreck Buster B's I thought it would be interesting to hook them into a parallel setup and see how it differed from a series setup

Unfortunately things did not go as planned! The first time I tried a parallel test the units were clearly not sealed
The series test resulted in leakage from the body of the 1st unit. I felt they weren't working together as well as they should have been. All I did was connect the hose of the 2nd unit to the exhaust port of the first unit.

It was after testing both those I decided I should have a control setup so then I ran the tests on a single buster B with the central vac hose. I was surprised that it has as much airflow as it had at the end of such a long hose.

Then I spent time re-setting the parallel setup trying to get a better seal and the back pressure created when the hose was attached cause the bucket to begin collapsing. When I tried to take a sealed suction test the bucket caved in and broke seals.

Since i'm feeling lazy here's the CFM number
Parallel initial: 50.87 CFM
Series: (estimated 2200) 57.42 CFM
Single Unit: 53.95 CFM
Parallel (Bucket) 131.02 CFM
Parallel final: 75.5 CFM

Are there better ways to test this? Certainly but the cost of it would be much higher and i'm not curious enough to spend the money.


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Post# 419764 , Reply# 1   2/9/2020 at 23:28 (1,509 days old) by Lesinutah (Utah)        
Hmm

lesinutah's profile picture
Idk would a extra shopvac to run bypass unit. It would be the vacuum taking the kids and the gain. It may not be possible just thinking out loud.
Les



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