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Thread Number: 34496
/ Tag: Recent Vacuum Cleaners from past 20 years
Bill's Inexpensive Airflow Box and Anemometer |
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| Post# 373005 5/31/2017 at 16:41 (2,514 days old) by wyaple (Pickerington, OH) | ||
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| Post# 373035 , Reply# 1 5/31/2017 at 21:54 (2,514 days old) by Tekjunkie28 (Western Va) | ||
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Oh boy!!! What have you tested so far? Any rainbows? I'd like to see a test of the E2 black with and without hepa. I have a CFM meter but I need more testing with it and something to back it up. My very rough findings of the CFM of a E2 is 100 CFM but I bets that's incorrect. | ||
| Post# 373038 , Reply# 2 5/31/2017 at 22:58 (2,514 days old) by wyaple (Pickerington, OH) | ||
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Shae,
Not my tests, but for a Rainbow E2 2-Speed the airflow is 77 CFM from the hose end and probably will drop to 55-60 CFM by the time I would measure it at the power nozzle.
My actual tests of a D4C SE shows 42 CFM and D4C SE PE shows 33 CFM at the nozzle respectively. Rainbows have never had great airflow unfortunately. Bill | ||
| Post# 373055 , Reply# 4 6/1/2017 at 09:48 (2,513 days old) by wyaple (Pickerington, OH) | ||
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We are talking about a water based Rainbow, Right?
Shae,
"I'd like to see a test of the E2 black with and without hepa." --Rainbows don't use bags, they use water. Yes, I know they have a HEPA exhaust filter, but it just sounds weird to say, "measure your Rainbow without HEPA". "The cfm out of the back of a E2 is about 100 cfm" --Exhaust airflow doesn't usually correlate to hose or nozzle airflow. Here are my measurements for a 1997 D4C SE PE Measured at the body = 3071 ft/min = 80.2 CFM Measured at the hose = 2303 ft/min = 60.1 CFM Measured at the exhaust base = 4311 ft/min = 113 CFM Measured at the exhaust hose = 3779 ft/min = 98.6 CFM As you can see the exhaust air is much more powerful than the "vacuum" air. As an additional reference, please search my posts here on VL that have words with "Airflow Losses" in the title and you'll find things like this: 
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| Post# 373064 , Reply# 5 6/1/2017 at 12:00 (2,513 days old) by sebo4me (Cardiff) | ||
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| Post# 373075 , Reply# 7 6/1/2017 at 18:08 (2,513 days old) by wyaple (Pickerington, OH) | ||
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Just to make sure I'm understanding you...
Shae,
You mention that 113 CFM at the exhaust port correlates closely to what you measured with your equipment, right? BUT, that's the exhaust CFM, not the hose or nozzle CFM. If you were only attempting to verify exhaust CFM, then we're good. If you were equating exhaust CFM with hose/nozzle CFM, there must be some kind of disconnect here. So just to be clear: My 1997 D4C SE PE does 60 CFM at the hose end and another YouTuber has measured an E2 2-speed and found that the hose (not exhaust) airflow is 77 CFM. Bill | ||
| Post# 373083 , Reply# 8 6/1/2017 at 21:37 (2,513 days old) by wyaple (Pickerington, OH) | ||
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My first live airflow box test has been posted | ||
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