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Now onto a critique of the D4's performance So from the hose end (I'm going to round here) to the PN base, I see a loss of 102-94=8 CFM. That is excellent. BUT, the total PN loss of 94-71=23 CFM really hurts the performance. Is anyone surprised or disappointed that such an expensive machine...

Excellent work Devin! Finally! I have inspired someone else to create an airflow box and post measurements. It's great not to be alone in this endeavor anymore. Please keep going and I'll help you as much as possible. As far as testing goes, here are my suggestions: 1) always use fresh...

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...

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...

In case anyone missed my measurements here's something to chew on: Dyson DC14 has 112" of lift and 59 nozzle CFM Hoover Tempo has 80" of lift and 80 nozzle CFM Hoover Convertible has 25" of lift and 107 nozzle CFM Kirby G6 has 32" of lift and 120 nozzle CFM The Dyson cleans the worst, the...

I like testing them and then posting the results. Some results surprise people and some don't. Bill

Adin, what I find so interesting about your descriptions is that: 1) I didn't really find anything about deep cleaning ability and 2) cost of regular maintenance Business owners will definitely demand budgetary numbers for any machine they purchase. After all, who wants to spend $500 on a...

To the O.P. Typically, if a motor starts popping breakers, it is drawing too much current. Or, it may be remotely possible that whatever circuit you're plugging your machine into has too much current already being used by other devices. If you can, plug your vacuum into a dedicated 15 Amp...

Someone who sells Miele tested The two "measured" readings and I was able to extrapolate the rest. Bill

Kevin, if you want totally insane cleaning power Get a Sentria II or Avalir. My airflow box readings are 137 CFM at the nozzle with a HEPA bag installed. That is so much cleaning power, it can completely clean the carpet UNDER the carpet. I got mine for $55 at a thrift store last year. It...

Mike, Your welcome! It's nice to inspire people to see something different. As a reminder, my Dyson DC14 has 112" of lift at the hose and 59 CFM at the nozzle. A G6 (just like yours) has 32" of lift at the motor base (low speed) and 120 CFM at the nozzle. The Kirby deep cleans easily and the...

Here's some vids showing what an XL2800 can do Bare Floor Tests Oreck XL2800 Oreck XL2800 Surface Debris Test Oreck XL2800 Flour Under the Carpet Test So surface cleaning and general carpet pile fluffing yes. Deep cleaning no. Oh, and don't pick up large amounts of debris as the tubes...

Smaller head machines take forever For me to clean 3000 square feet of flooring. My Kirby Heritage II Legend flies through large areas with its 15" nozzle. Any nozzle less than 14" wide seems like a toy machine to me. I think cord lengths should be at least 40 feet. I have a G6 with the 50...

Calum, Yes at the end of the video, I call them "risers". And the Heritage should be much heavier than any standard handheld. BUT, that machine can do 121 CFM at the nozzle. I would guess that the typical handheld might do 30-40 nozzle CFM. Bill

Jeremy, It's your plug. See if you can re-attach it in a more secure manner. Or, feel free to get a new plug. Bill

Tom G. would know but I'm sure he isn't allowed to t And I'm not being funny about it at all. Can you imagine if all (or at least some) vacuum specs were released? Heads would roll, jobs would be lost, factories shut down because... The consumer would just look for the best nozzle CFM and...

David, Thank you for posting your results, I think that took some "guts" to do so. True deep cleaning requires insane airflow (think 120 nozzle CFM) and if that matters to you, you already know what works and works quickly. But, the vast majority of the population doesn't care so much about...

I’ve been thinking of the best way to create the most revealing test(s) and show the most accurate results when deciding who "wins." One area of testing that has really bugged me is the ridiculous number of complete passes some testers and many (most?) laboratories perform. Let’s begin with...

Yes, it defines lightweight cleaning, so no high power deep cleaner here. BUT, it's small power head and light weight are what some people like. When I was in the checkout line, one mid-forties female clerk commented that, "she loves her Oreck and doesn't care how well it cleans." She...

How are you defining well built? 1) Long lasting without repair? 2) Best ergonomics? 3) Best performance relative to its age? 4) Other? More info please Hans. Bill