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If it can truly generate 53 cfm at the attachment end that is double what a Tristar can produce at the end of the hose, though the Tristar will also give you around 62-64 inches of suction at the end of that same hose. My corded VAPamore ( CRAPamore ) MR500 Vento produces a measured 30 cfm (...

Well I disagree. If you use only genuine Kenmore brand Style Q synthetic HEPA dust bags, their excellent CF-1 pre-motor filter and change the pre-motor and exhaust filters regularly they stay clean. I have a 16 year old Kenmore Elite 800 Series, the one with the CrossOver Brush power nozzle...

They still aren't. All one has to do is look at the filter in one of those piece of crap Diesoons to know the cyclones are not getting all the dirt. But go believe your Dyson marketing fairy tales. Just don't expect me to believe their lies. And that is what they are, bald faced lies.

You post marketing hype as references? That's what Dyson claims. It is not proof of anything except perhaps your own naivety. Anyone who has any experience with them knows how much those cyclones miss that ends up clogging the filter. If those cyclones are so good why have filters? Splain...

Today, yes, Rainbow is nothing special in terms of filtration. But forty years ago most vacuums were either some fabric shake out bag upwrong or a canister vacuum that used a porous paper bag and had at most a 1 mm thick ( thin ) piece of open cell foam on a plastic frame by way of a pre-motor...

The motor Sirena uses appears to be a thoroughly conventional commutated peripheral bypass motor. You can see the wires attached to the carbon brushes in this image. Click on the image to magnify it. https://www.goodvac.com/Sirena_S10NA_Motor_p/sirena-mj121002103.htm

Based on a Hyla promotional video showing their manufacture, the motor is a conventional brushed commutated motor. The first views of their motor occur 13 seconds into this video.

And again, you are wrong. Newcombe, Green and Rexair were all there decades before James Dyson was born. And obtw, without a HEPA filter your Dyson isn't extracting micron sized particles. Take that filter out or fail to clean / replace it as necessary and see how fast the motor dies from...

I honestly doubt James Dyson was and maybe still is aware that John Newcombe and Leslie Green even existed much less was aware they were selling a cyclonic bagless vacuum in the late 1920s. Dyson probably thinks it was his original idea but it was not. He was decades late to the party. I...

And again you are wrong. The very same person who invented the cyclonic dust separator who's idea you wrongly attribute to James Dyson was a partner in the very first application of that technology to a vacuum way back in 1927.

This video shows the cyclonic action of a Rainbow, a design that predates the birth of Dyson by decades. https://vacuumrepairshop.com/videos/angel-lopez/how-to-use-your-rainbow-vacuum-as-an-air-cleaner

Circa 1926 John Newcombe invented a dust separator using a cyclone to separate the dust particles from airflow in industrial operations like sanding or wood milling. Another person named Leslie Green saw the invention and thought it might be a great idea for use with a vacuum. Green teamed...

Panasonic designed their own cyclonic bagless vacuums for sale by Kenmore that are original and not Dyson copies. Far from it! The canisters have the same outstanding hoses, attachments, wands and power nozzles used by Kenmore and Panasonic branded bagged canister vacuums, not the miserable...

If you browse ebay there is a seemingly endless supply of Kirby attachments from all vintages. Complete attachment kits that are 50-60 years old or more turn up more or less continuously. It almost seems like for every old house that is sold the new owners find a pile of Kirby attachments...

The ATSM test procedure for removal of embedded dirt in carpet ( F608 ) specifies the kind of dirt to embed in the carpet, the quantity, the area that quantity has to be spread over and how many passes to make. It also specifies four different types of carpet to be tested as dirt removal will...

The sole exception would be the Commercial Hoover Hushtone upright. That is a solid piece of equipment, well designed, rugged and well built. I just used mine this morning. It might be the best upright Hoover has ever produced, light years better than my old Hoover Caddy ( Crappy ) Vac.

You can buy the VK7 from Japan and use it in the US. Japan has 100-105 volt power and they use a plug compatible with US wall outlets. I run a Vorwerk Tiger 260 with the EB360 power brush, sold in Japan as the Lux Sora, on US power routinely. Really good vacuum. I have a Japanese Panasonic...

Older than his parents, and maybe older than his grandparents

If you look at the Metrovac website they require prospective dealers to have an independent on-line store that meets certain qualifications. https://metrovac.com/pages/wholesale-inquiry

That design dates to the mid 1940s. I have an example that was produced before the end of 1945. How do I know? It was made in El Segundo. Interstate sold that plant before the end of 1945 and moved vacuum production to Anameim. The original Compact Model 1 uses literally the same inner...