Suction vs Airflow: No high suction needed to clean well

[alexhoovers94]

I don't get what this obsession is...Who really cares as long as the carpet is clean for the most part...We have had the same carpet for the last 20 years, cleaned with several types of cleaners...It hardly looks any different than it did originally, apart from it has faded slightly.

 

[mike811]

Many good vacuums in all categories

I personally like to do these test just for fun.
I like big variety of different type vacuum cleaners what I have. I mean bagless, bagged, dirty air and clean air. In each category is many well cleaning vacuums.
My personal point is just to show the differences in different type of vacuums.
These differences are fairly small for the normal consumer.

It just make me think when the Dyson DC65 doesn't even touch the flour under the carpet, but Kirby Sentria II removes it completely.

 

[drsnuggle]

Thanks!

I feel a responsible for kick starting this thread again. And I like the input.
Thanks for your responses

 

[sebo4me]

Haha I agree with what you say Alex but some people like me are geeky about vacuum cleaners

 

[drsnuggle]

Like being a child again!

My last response was written on the subway on an Iphone so now some additional questions I have. I just want to learn (but I do agree with AlexHoover94) and it is fun in a childish way.

I was looking at your channel vaclabs and could you do an airflow test with a hose attached to a direct air vac (people say it will lose a lot of airflow) and compare it with a clean air high quality vacuum (e.g. your Miele canister or the green Riccard)? Just for fun of course. The nozzle test you (and vacuumtests) has already done, showing the Kirby to perform the best (I am more pragmatic as AlexHoover94 + n0oxy, but I am interested).

And if you or vacuumtests have already covered a hose test then please post a link.

My home is mostly bare floors and low-piles so I do not feel the need for a Kirby, but I can definitely see that it is one of the best Quality vacuums. And I am no friend of chinese crap. I agree of buying US-products if you live there. I live in Sweden and would buy Swedish if not all was sold out already.

 

[mike811]

I almost feel that I went too far with these tests. I guess I am a vacuum geek then LOL

Now keep in mind people that one of my all time favorite vacuum cleaners come from the 80's and it's not the Kirby. It's the Philips P74 Electronic. I like it much better than anything made today.
And the most shockingly my favorite modern upright is the Shark Rotator Lift Away Pro. AND I just ordered new Shark Rotator Slim Light Lift Away NV340UK. I don't even shame on that

My all time favorite Vintage Philips P74 Electronic:

 

[rolls_rapide]

An X type graph

No, I don't think the graph was an "X" shape.

I can't remember now, but it might have been a loose "U" shape, or an inverted "U".

The graph wasn't in the multi- cleaner Hoover 'Collection' brochure. I think it was in one of those 'stand alone' fly-sheet brochures for the Alpina range only, which consisted of between 2 and 4 sides of A4 paper.

 

[drsnuggle]

U-shape graph

A U-shape is what it should be if you plot it right and you reach a peak where suction and airflow is the best. Here is a link to why I said X shape (look for Suction versus Airflow).

http://www.westernwholesalevacuums.com/central-vac-buyers-guide1.html

Vacuumtests: Sorry, but this is interesting and your the reason for it . On the contrary I am really enjoying this thread. And obviously others as well I Suppose. No, you should feel proud of what you done. I am also a geek so.. Not only vacuums, but chess, statistics, cats....
I love vacuums in a different way then you but that is another thread some one started for that topic. I am not a premium member though so I have to pick my threads.

 

[wyaple]

Jakob,

Here's an airflow test of four of my canisters. The best one by far at the end of the hose is a...wait for it...upright. With a decidedly underwhelming 40" of lift, a 2013 Kirby Sentria II in canister mode sucks to the tune of 120 CFM. Proof you don't NEED high suction to attain high airflow. To compare, a $1000+ Miele C3 does 101 CFM at the end of it's hose. The Miele definitely has more suction, but the airflow is worse.

Remember: Airflow is literally the speed of the air and suction is the pressure (force) of the air. For the most part, you can feel suction easily, but not airflow (unless you put your face in your vacuum's exhaust).

Bill (VacLab)

 

[wyaple]

Ametek Monster Motor Graph

I've posted this many times before, but here is an example of a large, powerful canister motor. Peaking at 675 Airwatts makes you think this nearly 14 Amp baby has massive airflow, right? But you would only achieve that if you hooked up a 2" diameter hose! Using the typical 1.125" hose, the airflow plummets to 106 CFM. Hook up a power nozzle with its wands, u-joint, and seals and the result will most likely be in the mid 80's. Oh, it'll FEEL like it can "suck the paint off the walls", but deep cleaning will suffer dramatically.

BTW, all motor graphs are not like this one, they vary in shape dramatically.

Bill

 

[mike811]

Unfortunately many manufacturers show the airflow rating only measured straight from the motor. I have seen even Miele and Sebo doing this and claiming huge cfm figures. Sounds good, but it's far from the real cfm.

158 CFM. Really?
http://www.ristenbatt.com/xcart/Miele-S8590-Alize-S8-Canister-Vacuum-Cleaner-Specifications.html

 

[drsnuggle]

Who needs CFM or waterlift when....

Well Mike81, thanks god we have a standardized label system for vacuums in Europe (EU) .

(I am kidding of course)

Mike81: Where did you buy your Baird meter? I am so taken by this I would like to compare my own vacuums (not for videos, just for knowledge).