Four months: that is how long Dreame says its D20 Air Plus can run before anyone has to touch the dust bag. The robot vacuum and mop is part of Amazon’s early Prime Big Deal offers, where Prime members can get the Dreame D20 Air Plus for $227.99 instead of $349.99, a 35% cut. A self-emptying dock is the feature I’d look for first in a robot vacuum, since it decides how often you have to think about the machine at all, and here it comes with a mop as well.
20,000Pa and a Dock That Empties Itself
The dock is the reason to pick this model over a bare robot. After each run the D20 Air Plus returns to its base, which pulls the contents of the onboard bin into a sealed 4-liter bag, and Dreame puts the capacity of that bag at up to 120 days of dust, pet hair and debris. The bag closes itself when it is removed, and the company claims it holds in 99.9% of allergens. I’d treat the four-month figure as a ceiling, because a home with two shedding dogs will fill a bag faster than a one-bedroom apartment with hard floors.
On the cleaning side, suction is rated at 20,000Pa, the headline figure of the listing and one that matters mostly on carpet, where dust sits deep in the fibers. Dreame has also worked on hair, which is what stops most robot vacuums in practice: the main brush is designed to clear hair as it turns, and the side brush has an anti-tangle shape so that long strands don’t wrap around it. Anyone who has sat on the floor with scissors cutting hair off a roller will see the point. The robot is built to run along baseboards and into corners as well, the places where crumbs collect under kitchen cabinets.
Mopping happens during the same pass as vacuuming. The water tank is electronically controlled, with flow settings that go from a light wipe to a wetter pass for dried-on marks. There is a limit to be aware of here: the listing describes a dock that empties dust and says nothing about washing the mop or refilling the tank, so I’d count on doing both by hand.
Navigation relies on LiDAR, which lets the robot map a home in a few minutes and find its way around furniture with the lights off, so a cleaning run can be scheduled for the night or while everyone is out. The app is where the map gets used: you can draw no-go zones, schedule cleaning for specific rooms and change the suction level. Two restrictions appear at the bottom of the listing. The robot connects to 2.4GHz wifi only, and this version is sold for use in the United States. On Amazon it has a 4.2 out of 5 average across more than 3,600 ratings.
The price is reserved for Prime members: the Dreame D20 Air Plus with its self-emptying dock costs $227.99 on Amazon, against a list price of $349.99. Amazon labels it an Early Prime Big Deal and applies it to both versions of the D20 Air Plus on the page, listed as D20AirPlusB and D20AirPlusW. For comparison, the same page shows the D20 Plus at $309.99 and the D20 Pro Plus from $303.96, which makes the Air Plus the least expensive model of the three. Returns are free.