The Aqua20 Pro Ultra Roller X Complete is Dreame's new flagship robovacWorld's first robovac to use heated steam at 180°C as part of its mop systemCan also clear double-step thresholds up to an impressive 3.9in / 10cmWhen I spoke to a load of major robot vacuum brand execs about where they thought robovacs were heading in the next five-to-10 years, a common theme cropped up: the desire to close the performance gap between manual and robotic floor cleaners. That's not just the vacuuming power, but the mopping prowess too.And so, at IFA 2026, we have the world's first robot vacuum with steam cleaning powers: the Dreame Aqua20 Pro Ultra Roller X Complete. It's an exciting prospect, but based on the demo I saw, I'm not sure I'd be throwing out my manual steam cleaner any time soon. The Aqua20 Pro Ultra (I'm not typing the full name each time) vaporizes water into 356°F / 180°C steam, which is pushed out through four outlets along the roller edge. This steam is designed to loosen tough, dried-on stains. The roller then gently scrubs them away, using hot water. On the demo I saw, the steam function seemed quite gentle — there wasn't enough to be visible on a still photo, although you can see it in the video clip above. My first concern about the system is that there might not be enough steam to really make an impact.The second is that because the heating happens inside the bot itself, using it has a big impact on battery life. I spoke to Dawn Chen, a Director at Dreame, and he confirmed that with the steam function on, the robot's runtime is around 30 to 40 minutes, compared to around four hours with it off. Steam needs to be switched on and off manually, in the app, and can only be used for a zone that's less than 10 square meters in size. Chen explained that the function is meant for spot-cleaning only; to tackle stubborn and dried on stains. That runtime is fairly limiting. It makes it difficult to use the steam function as part of a more extensive cleaning session, which is a situation I expect will be common. Making it workThe process of adding the steam function caused Dreame a few headaches. "During this R&D process, we faced two main problems. The first is about the limescale. Because we are turning the water into steam, this process will produce a lot of limescale," Chen explained. "To solve this problem, we added some limescale remover inside the robot, in the pipeline."The second — and perhaps bigger — challenge was to do with controlling the temperature inside robot itself. "Because we put this kind of heat inside the robot body, the heat it produces will affect other components, especially the electronic components inside the robot body," Chen told me. To address the issue, the engineers had to add internal insulation to protect the different components. And that was easier said than done — Dreame had to completely redesign the inside of the robovac to add the steam components, and insulation, while still maintaining the streamlined shape and size. (Image credit: Future)All the talk of limescale and preventing damage to internal components instills a certain amount of fear in me. I can't help but wonder if iRobot might have had the better approach — that brand's new Roomba Max 875 expels warm mist rather than steam, and the active heating happens in-dock rather than on-bot. The demo showed a much denser cloud of mist than Dreame's bot was expelling, and because the Rooma bot itself isn't doing any active heating, using the mist function has a minimal impact on battery life. Of course, the really important thing is how effectively each robot cleans, and we won't know that until we've had a chance to test them.Other upgradesBack to the Aqua20 Pro. Aside from the headline steam feature, you'll also find an upgraded 'Proleap' system that can now bump the bot over single steps up to 2in / 5cm, or double steps up to 3.9in / 10cm. That's the tallest threshold clearance I've seen from any brand (so far) although in the demo it sometimes took a couple of run-ups to make it over. Dreame has also added enhanced AI vision with adaptive learning — so the robovac can apparently react to moving objects and re-plan its route, in real time, in response. The roller can kick out from the side of the robovac by up to 8cm / 3in — much further than its predecessor, the Aqua10 Ultra Roller Complete — to get nice and close to the edges of rooms. To avoid unwanted dampness while all this is going on, the main vacuum roller and side sweeper can both lift (by 5mm and 10mm respectively) while the mopping is happening. The roller can also lift 15mm when the bot is traversing carpet.The Dreame Aqua20 Pro Ultra Roller X Complete is due to launch on September 21 in Germany, Austria, Spain, Portugal, and Switzerland, followed by a number of other European countries. I don't have a launch date for the UK yet, but Chen promises it'll arrive before the end of the year. Due to FCC regulations, launch in the US is unconfirmed.