Thread Number: 37822  /  Tag: Recent Vacuum Cleaners from past 20 years
2003 Miele Solaris S514 Airflow Losses
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Post# 403223   12/28/2018 at 14:47 by vaclab (Pickerington, Ohio)        

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Probably my most dull and boring video yet. Who watches this stuff anyway? :)

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Post# 403256 , Reply# 1   12/29/2018 at 01:22 by vacuumdevil (Denver)        

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It should be about 85-90" at the hose 5280 feet above sea level.

Wonder why that is ?

Post# 403278 , Reply# 2   12/29/2018 at 14:15 by vaclab (Pickerington, Ohio)        
Sure, I Have Many Reasons

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BTW, I'm at 837 feet above sea level, so based on:

The differences would be much greater (>13%) than what's been discussed here so far, assuming no other mitigating factors.

First, do you know of videos showing a 15 year old S514's suction measured at the canister and/or hose end? I'd like to see one.

1) When I do "blind" measurements like this, I can only report what's measured.
2) How many samples of the S514 have you thoroughly tested? I only have one sample. I can't comment on the variances of one sample.
3) Due to the effects of aging, one would expect different results than when new.
4) Do you test your machines warmed up or cold? I've seen up to a 5% difference so far depending on internal motor temperature.
5) Do you keep a formal log of your measurements like I do (obviously) or is that suction range of 85-90 from memory?
6) Did you see the rather large 30.8 CFM canister to hose loss? That's a bit excessive and may point to a leakier than normal hose. After all, it's been beat up for 15 years.

So considering the excessive CFM loss from the hose, I would say that's where some of the lower suction numbers come from. But despite that, it still has great airflow not only at the hose, but also at the power nozzle.


Post# 403313 , Reply# 3   12/30/2018 at 12:35 by Mike811 (Finland)        
Miele C3 Powerline

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Here is my latest measurements.
Note that it has 8 ft hose.

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Post# 403316 , Reply# 4   12/30/2018 at 14:10 by rivstg1 (colorado springs)        

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wow, those are some high numbers!!!!!

Post# 403320 , Reply# 5   12/30/2018 at 14:53 by Mike811 (Finland)        

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My C3 is the European model with motor rated at 1600 watts. However in reality it uses 1415 watts. So it wouldn't be too much for the US. Also note that the hose is upgraded to 8 ft. Original hose was 6 ft and it got 121 cfm from the hose end and 95 cfm from the nozzle. 6 ft hose was in my opinion way too short.
Bills Miele Solaris S514 is still very good in my opinion :)
Here is my measurements video with the original hose:

Post# 403407 , Reply# 6   1/1/2019 at 11:22 by vacuumdevil (Denver)        
New Balance Man

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2) How many samples of the S514 have you thoroughly tested? Hundreds .

4) Do you test your machines warmed up or cold? I've seen up to a 5% difference so far depending on internal motor temperature.
room temperature (68-90 degrees) should not make a difference

5) Do you keep a formal log . At one time I used too, no real need when you see this stuff every day for 15+ years you get to know what it should be.

6) been beat up for 15 years.
Sounds like you're testing a thrift store special. doesn't sound like it's been properly gone through by professional or another collector who's good at cleaning up machines.
Most likely your motor is going out. These things are pretty precise from Germany.

This was my daily use a Shop-Vac for over a year. Got to know this little machine pretty well.
I'll test one in working order and let you know.

Happy New years!

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