Eureka/Hoover/Dirt Devil
The Hoover Multi-Cyclonic canister is the same vacuum (albeit with a power nozzle) as the Eureka Air Excell, as well as the Bissell PowerGroom Multi-cyclonic. They're all made by King Clean in China. TTI added a power nozzle based on Vax's "Air" brush roller in Europe. You'll note the Dirt Devil Multi-cyclonic canister is (with an added bin handle) also the same vacuum as the Hoover, Eureka, and Bissell. It's a world market. King Clean is a major player. They build the popular Hoover Windtunnel Air models, as well as the Vax Air models. All that's happening is that each country is the world is getting the same Chinese vacuums - they're just made for a certain market.
Fuller Brush is a China-built vacuum brand carried by Tacony. King Clean builds a number of them. Our Marketing Director has video on her phone of the factory in China. It's enormous. All the assembly lines were making versions of the same vacuum, in different colors, with different brand names on them.
All Shark and Euro-Pro vacuums are now made by King Clean.
Yet, King Clean can make really good quality machines as well (the Simplicity Verve comes to mind). As I said, the Chinese will make them any quality you ask for. Bear in mind that "manufacturers" (like TTI) are actually in bed with the retailers (Wal-Mart). The retailer demands a 2 year 'lifecycle'. TTI's engineers go to King Clean and have them built to their specifications. TTI is driven by profit and so need to move volume to make money. Having King Clean make the Windtunnel Air for (let's say) $60. It's sold to Wal-Mart for $110. They sell it for $149. Built into that wholesale cost by Hoover is the tremendous cost of the returned machines as well as the advertising and the warranty problems. There's not a tremendous profit once you factor in all the costs.
The consumer demands ever lower priced goods. We want "Dyson swivel technology" for $150. So TTI give it to you, but in a vac that will only last 100 hours, because that's all the carbon brushes were designed to last. Everything Dyson charges a premium for ("Swivel Technology, Multi-cyclonics, etc.), consumers are demanding (and buying) in far lower priced (but much less durable) vacuums.
Go to the vacuum aisle at Wal-Mart sometime soon. There's a $47 Eureka, dual cyclonic, upright vacuum. Feel the cheap plastic. See that there's just one filter, and its a single piece of foam. But it's $47. Wal-Mart demanded that Eureka give them an alternative to the $47 Bissell Clean-View bagless. Eureka went to King Clean, and now it's at Wal-Mart. All the downward durability spiral in modern 'cheap' vacuums, can be laid at the feet of the largest retailer in the world.