More airflow tests.

[mike811]

Over 100 cfm from the hose end is very powerful for a clean air vacuum cleaner.
I measured 108 cfm from my C3 with a 1.8 meter (6 feets) hose.
Clean air vacuums don't really go much higher. It's physically impossible (hose & pipe diameter).

 

[blackheart]

Well...

The highest hose end flow rate i've gotten from a Canister is about 108 my latest flow reading was 107.89, the number came from my Henry HVR200-11. The highest one i've heard of was a Lux marquis with a replaced 12 amp motor which pulled about 120 cfm from the hose without a bag.

 

[mike811]

I have seen that video. 160 cfm from the canister end
I thought it was 110 cfm from the hose end

 

[vaclab]

Mini-Meet #2 Marquis Measurements

Are somewhat on the "quick and dirty" side with the Luxes. The Sentria I airflow box is exact (127.4 CFM) as I measured that Kirby several times over several minutes.

When using the GM8901 anemometer, please use only this conversion to obtain CFM from Ft./Min.: 0.0260990

It was derived from these measurements and formula.

Diameter of GM8901 Anemometer Detector = 2.1875 inches
Radius = 1.09375 inches = .0911458 feet
Detector Area = 3.1415926 x .0911458 x .0911458 = 0.0260990 (rounded)

Can't wait to see your airflow (and nozzle suction) tests as well as power usage measurements.

Bill

 

[mike811]

I am excited to test the airflow box.
Biggest challenge is to make a good seal between the nozzle and the box.
Of course I can test it with the baird meter before the GM8901 arrives (without the hose adapter).
So the formula is anemometer result x 0.026099. I will use it.

Now i need to get some sealant material for my airflow box.
I was wondering if I can cut pieces out of my blue rubber backed very low pile rug and make a custom pieces for each nozzle?

 

[vaclab]

That might work, but some people use

Foam rubber weatherstripping, which is usually very inexpensive. I use microfiber cloths because I have a lot of those and they are easily configurable. They look terrible, but work very well.

Bill

 

[vacfan1982]

Yes over 100cfm at the hose end it very good for a clean air but it drops significantly at the floor nozzle. Much more than I'd expect.

 

[blackheart]

Mark

From what i've noticed the powerhead leaks a lot. If you seal the brushroll opening you can feel air leaking around the swivel neck connection and (on the SEB228) Near one of the rear wheels where there is a vent for motor cooling.

 

[blackheart]

Regarding the supped up Marquis

Yeah, I re-watched the video on it the hose cfm was taken using a baird guage so we were told 110 cfm without a bag at the hose end. The flow was also not taken with a bag and that makes me wonder how much it would have been reduced looking at Bill's olympia test that machine pulled 113 from the machine without a bag and went down to 104 when a hepa bag was installed. that machine lost a mere 9 cfm at the bag chamber but unfortunately this number isn't a constant the power of the machine is going to have an influence over how much will be lost and i think it's safe to say that machine with higher flow also have higher losses. I don't have a number for the no bag hose end olympia but if we compare the numbers from the bag in test and the marquis from the video

Olympia Body: 104 Hose: 95 91.35% of airflow retained
Marquis (suped-up) Body 160 Hose :110 68.75% of airflow retained.

I've also taken a look at my Filter Queen airflow tests since i used the exact same hose wand and powerhead the only variable was the machines themselves. I see it here too where more flow is lost from the more powerful machine. Oddly the wand was consistent, possibly due to it's smooth interior?

 

[vacfan1982]

Devin I use my Miele C3 with a Sebo ET1 PN. I think you would measure a higher CFM with this set up.

 

[blackheart]

You'd increase your airflow density due to the smaller area of the nozzle, and you would probably have a very slight increase in flow at the head. I feel though that the wessel-werk head has better agitation though, but I have no good way to measure that.

 

[vacfan1982]

Yes the Miele has better agitation but I prefer the ET1 as the brushroll is about a third of the price of the Miele and much easier to remove. The build quality of the ET1 is very robust.

 

[blackheart]

That's very true!

The cost of consumables on a Sebo is often, if not always, lower than Miele and the brushroll is much easier to change.

 

[mike811]

So here is the very first test of my airflow box with the Vorwerk VK 135.
I still need to do some modifications to seal it better.

 

[blackheart]

Hmm

We went from about 108 to about 85 granted i'd assume this is the majority of the flow you may get a few more cfms with a better seal. For a clean air vacuum 85 is pretty great it surpasses all but two i've the machines i've measured thus far.

 

[mike811]

I was quite happy to the result, but the seal between the box and baird meter leaked. Also the cardboard seal wasn't the greatest. It should have around 90 nozzle cfm.

 

[blackheart]

Lux platinum part 1.

Well the platinum arrived today and I thought i'd have to hold off until new filters were purchased but the ones that came in it must have been very new as I think this machine was purchased in 2014. So here's some pictures and i'll place the results in the next post so one doesn't need to dig through these to find them. I cannot get a proper seal on the machine's inlet due to it's shape but I threw the picture in anyhow for fun.

 

[blackheart]

Lux platinum part 2

And here are the results. This machine has the higest flow i've seen out of a canister. I do think the power nozzle holds it back. It's undoubtedly a nice machine it's very quiet and has a lot of both suction and flow (at least for a canister). I'm a little iffy about it at the time but we'll see how continued use of it changes my views.

 

[vacfan1982]

Excellent results. This has to be the most powerful cylinder)canister cleaner available.112 CFM at the end of the hose is very impressive.

What makes you iffy about it Devin?

 

[blackheart]

Well

It's mostly the power nozzle. While lux nozzles are reliable (generally) I don't feel they're very good deep cleaners. The wands are also a little short for me (I'm 6'4") The canister itself is nice it's quiet it's got a powerful motor but the bag capacity and 2 filters would be rather costly over time, though i suppose if you have the money for one of these new that's the least of your worries. It also seems to have a high pull weight even on bare floors, all the wheels spin freely.

I dunno I like the style and the power of the main motor, but i just feel that power nozzle just drags this whole thing down, despite it's airflow advantage I have a feeling my Miele, Simplicity, and possibly Sebo canisters outclean this on carpeting.