Thread Number: 34006  /  Tag: Recent Vacuum Cleaners from past 20 years
Bagless vacuum with a good airflow. Is there any?
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Post# 368686   3/19/2017 at 12:22 (187 days old) by Mike811 (Finland)        

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So after I got my baird airflow meter and testing different vacuums bagless/bagged. I discovered something interesting.
Bagless vacuums seems to have a poor airflow compared to bagged ones.
Some examples:
Bagged vacuums (clean air type) pulled around 5 to 9.
Best: Philips Performer Pro (20amps 2200w) pulled 9.
Bagless vacuums pulled around 2 to 4,5.
Best: Electrolux UltraFlex (19amps 2100W)
This is something what I have seen in numerous Youtube videos also.
Also the best bagless vacuum Dyson usually have only 2 from the baird airflow meter.
So question is: Is there really bagless vacuum that can pull at least 5 to 6??


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Post# 368692 , Reply# 1   3/19/2017 at 12:51 (187 days old) by sebo4me (Cardiff)        

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I don't know what the Dyson DC 41 Mk11 would score on the Baird meter but it has over 90 inches of water lift has excellent agitation and cleans extremely well as does the Shark powered lift away.
Obviously not as much airflow as a direct air machine but still good enough for most. :-)

Post# 368693 , Reply# 2   3/19/2017 at 12:56 (187 days old) by sebo4me (Cardiff)        

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When I say good enough for most I'm talking about the general public not VL members 😂

Post# 368694 , Reply# 3   3/19/2017 at 13:04 (187 days old) by Mike811 (Finland)        

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Nice to hear that.
I have Shark Rotator Lift-Away Pro which cleans quite well (not good as the Kirby G6). I just have one carpet where it struggles to get it clean. Otherwise pretty good and it only pulls 2 on the airflow meter. Kirby pulls 10.
Shark is just very easy and versatile to use.

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Post# 368699 , Reply# 4   3/19/2017 at 13:31 (187 days old) by sebo4me (Cardiff)        

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I don't know why they only score a 2 on the Baird meter, the suction feels strong if I put my hand over the hose on the Dyson. Very strong. 😂

Post# 368703 , Reply# 5   3/19/2017 at 13:51 (187 days old) by Mike811 (Finland)        

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Well reason for the poor airflow might be the complex piping due to the cyclone system.
When I test the Shark suction with my hand it feels strong. However when I attach the turbo nozzle to the hose it really don't spin that fast. On the Philips turbo brush spins really fast :D

Post# 368704 , Reply# 6   3/19/2017 at 13:59 (187 days old) by sebo4me (Cardiff)        

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Yes you're probably correct :-)
I hear the Kenmore vacs have very good airflow but like many Vacs in the USA id like to try they are not available in the UK sadly. 😦

Post# 368728 , Reply# 7   3/19/2017 at 20:08 (187 days old) by wyaple (Pickerington, OH)        
Here's All My Baird Meter Tests To Date

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You can see that from the base of the machine (BEFORE the cyclones) in the various bag less vacuums listed here, airflow is excellent. Baird tests reveal a 9-10 range.

AFTER the cyclones, the airflow drops like a stone, typically down to a 3. The best airflow at the hose end I have is a DC14, which scores a 4 (about 77 CFM).

BTW, when testing your machines, be sure to stretch the hose out straight and as level as possible. Twisting the hose up like a pretzel reduces airflow and thus your Baird reading will be lower.


Post# 368729 , Reply# 8   3/19/2017 at 20:21 (187 days old) by sptyks (Woburn, MA)        

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You are confusing Airflow with Suction. They are two very different things.


Suction is measured in inches of water lift.

Airflow is measured in Cubic Feet per Minute (CFM). This measures how many cubic feet of air flows thru the machine in one minute. This is what the Baird meter measures.



Post# 368738 , Reply# 9   3/20/2017 at 00:41 (187 days old) by sebo4me (Cardiff)        

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I'm not confusing them. I'm well aware that a Baird meter measures airflow and waterlift measures sealed suction. I was just saying the Dyson has over 90 inches of water lift.

Suction and airflow are 2 sides of the same coin. Without suction there is no airflow :)

Post# 368748 , Reply# 10   3/20/2017 at 06:26 (186 days old) by sebo4me (Cardiff)        

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Both a direct air and clean air vac work on the same principle.
The motor spins a fan which causes a drop in ambient pressure and causes air to flow.

A direct air cleaner has the bag after the fan and pushes the dirt into the bag.
A clean air machine has the bag before the fan and pulls the dirt into the bag. It's not rocket science is it 😁

Interesting results. So it's the cyclones that reduces the airflow.

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