Interesting technology from Dyson, so a floor height adjustment in Dyson terms is now being used, well in the USA! Can't see this model coming to the UK! Be interesting to know, looking at the video if the user can remove the brush bar! The brush bar is lifted for hard floors not turned off!
Looking at the information and general experience what I understand is normal height adjustment lets airflow into the cleaner head longs the height is set right will pickup! Where as a sealed cleaner head to the floor depending on carpat pile height could reduce the airflow into the head! Or am I completely talking rubbish!!! Just a thought!
Hi Acerone,
Dyson is merely doing what it should although it would have us believe it's done everyone else one better.
Old time religion -- the vacuum kind I mean -- had it that the best way clean carpet was to have it slightly lifted up to the brushroll by the cleaner's suction. The idea was that along with agitation by the brushroll air drawn in through the carpet's backing would better facilitate the removal of embedded material(the grit and dirt down at the base of the carpet fiber. Direct-air uprights like Royal's classic uprights, Sanitaires and clones and Kirby still employ the method. However with the coming of Hoover "clean airs" plus canister vacuum power nozzles the notion may have been left to gather dust on some ad man's desk. As to whether it is fact or fiction I can't say even though I still see old-fashioned Kirby as a benchmark in regard to performance on carpet.
Hoover Dial-A-Matic cleaners were more designed to travel smoothly and not bog down on thick carpeting, the reason for the broad roller behind the brushroll, apparently did a good enough at cleaning. Height adjustment was later.
Electrolux's and most other PNs, first to last, merely ride on top of carpeting as well. Here again, adjustments of whatever type made available are not there to encourage suction to lift carpeting up from the floor but merely to make them easy to push.
That said -- the new design approach apparently left no one complaining as it hasn't changed.
Dyson's cam thing, if I am correctly interpreting what I've seen and read, raises and lowers the brushroll within the confines of the brushroll chamber as opposed to uprights that allow users to manually or electronically raise or lower a clean-air's cleaning head. A nice idea though a little elaborate. Miele has its spring loaded brushroll which does just fine. Sebo X series models won't be going anywhere either. However, in the name of "innovation" the new features may better justify price.
As for the claims about "leaking suction" -- baloney. As long as a carpet height adjustment is properly set there's nothing to lose. Besides which, airflow (good air movement from outside into the brushroll chamber and on to the capture area) is essential for all vacuums to work well and the greater issue is how well it is directed to bring that about.
As for the "heavy cleaner heads" matter, this is another off-the-wall claim. Weight being an essential selling point these days, I know of no uprights that are weighted down for the purpose of maintaining contact with carpet pile.
AND the "improved torque" for driving the brushroll is yet another moot point. A brushroll either turns as it should or does not. Has belt slippage been a major problem for Dyson owners here in past? What escapes me here is why not rethink the brush roll, why not go self-propelled.
Venson
