The DC40 has new technology, but its performance isn't strong enough to warrant a $500 price tag.
Like the Dyson DC39, the Dyson DC40 Multi Floor uses "Radial Root Cyclone" technology, which Dyson says maximizes suction and helps pull in more ultra-fine dirt particles. The DC40 also includes a self-adjusting cleaner head that is supposed to make moving between surfaces easier. These additions and its lightweight frame are the vacuum's major assets. The Dyson DC40 Multi Floor glides across carpet and hardwood with ease and has great handling. The big problem with the DC40 was its performance on carpet, both short and long. Though its nozzle head is meant to be "surface agnostic", it just doesn't perform well enough to justify the $500 MSRP, a very high price for a vacuum.
Design & Usability
There's a lot to like about the Dyson DC40 Multi Floor when it comes to handling and usability.
We liked the Dyson DC40 Multi Floor's handling around corners and how simple it is to pull out its extension wand. You can do a lot with the 2.9 foot wand—clean stairs, shelves, ceilings—as result of its impressive 11.5 foot reach. It's easily removed by flipping up the grey tab at the top of the vacuum and pulling the red tube up. We were impressed with how effortlessly it turned, gliding smoothly along most surfaces. With an above-average power cord at 27 feet, you shouldn't have trouble moving from room to room.
There are really only two controls on the Dyson DC40 Multi Floor, both of which are located at the middle of the vacuum: the red power button and grey power brush on/off button. According to Dyson, the nozzle head adjusts automatically to whatever surface it's cleaning; because of its struggles with carpet, though, we aren't sold on just how useful the feature is. The dirt holder is easy to remove (clicking on the red button that connects it to the vacuum) and just as simple to empty through its trap door, which is done by pressing the red button again. A purple HEPA filter is found inside the dirt container and is hand washable.
Features & Performance
The Dyson DC40 Multi Floor was lacking in carpet cleaning, but impressed with its large debris pickup capabilities.
If you have a house with lots of carpet...forget it. This machine, despite its high-end price tag, performed miserably on both long and short carpets. Hard wood floors did fine, though, so if you've got smooth surfaces covering the rooms in your home and you really like a user-friendly machine, this one may be worth the money. Oddly enough, both pet hair and debris came up without a problem; in fact, this machine did a better job picking up both light and heavy debris off of carpet compared to how it did with hard woods.
It seems that this machine simply lacks the ability to provide a deep clean, but does a fine job on flat surfaces. For some added versatility, you receive a separate pet hair brush and crevice tool along with the Dyson DC40 Multi Floor that attach to its extension wand. The Dyson DC40 Multi Floor is pretty light for an upright, weighing only 14.34 pounds. That light weight comes with a price, though: you can expect the dirt container to fill up pretty quickly, since it can only hold 0.48 gallons at a time.
Huge price for only okay cleaning overall; don't even both if all you have is carpet.
In spite of some new features, such as "Radial Root Cyclone" technology and a new nozzle head that adjusts to carpet height, the Dyson DC40 Multi Floor doesn't do much to set itself apart from the DC41, or any other vacuum for that matter. It's lightweight and handles very well, but it only really excelled on hardwood and debris pickup. Though we liked some of its usability features, such as a long extension wand for shelves and stairs, they isn't enough to outweigh the vacuum's lagging performance. Your $500 can be better spent elsewhere.
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