TechKnow: Robotic vacuum cleaners put to the test
ROBOTIC VACUUM CLEANERS
Robots have long been taking over humans' jobs, and in at least some cases, such as vacuuming, they're welcome to them. Robot vacuum cleaners not only clean while we get on with other things, but also tackle difficult areas, such as under couches and beds, are quieter, and require less space than conventional vacuum cleaners.
I tested the new, high-end iRobot Roomba 980 and Electrolux PUREi9. Both are fitted with 3D-sensing cameras for more intelligent navigation than cheaper models, and can be operated remotely through Wi-Fi-connected, cloud-based apps. So you can schedule your robotic helper to clean when everyone will be out, set it to work at a moment's notice when you're far away (great for short-notice guests), see its mapped progress, and check if it's done. Both can also be operated manually, including for spot cleaning, and are fundamentally fit for purpose: they pass the uncooked rice mess test on carpets and hard surfaces.
While smarter than most robotic vacs, they are still stumped by stairs, which they simply avoid, and potential entanglements, including cables and fringed rugs. Generous clearance is required around their home bases, so it may be tricky to find a convenient location near a powerpoint.
PUREi9, $1699
Relying on visual sensors and memory to get around, this appliance can be inefficient, at least initially as it builds up a map, or if objects are moved around the home – not ideal with only 40 minutes per charge. The upside of its cautious algorithm is the PUREi9 approaches objects gently. The roller's combination of rubber and bristles handles different dirt and surfaces well, and the wide side brush gets into corners particularly effectively.
ROOMBA 980, $1499
Generally working in straight lines, and with sensors on the home base to help it dock, this makes efficient use of its two-hour charge. It tends to bump into things, so two small, included accessories that can be placed anywhere to create virtual walls are useful for protecting fragile objects (or block off rooms). It's slightly noisier, the filter needs replacing every two months (compared to the PUREi9's six) and the dirt container is smaller.
VERDICT: If you aren't around to watch your robot vacuum in action, the end result suggests there's little to separate these two appliances. The PUREi9 seems to obsess over where it is and what's in its way, especially during initial mapping, whereas the Roomba is fast and efficient from the get-go.
CHECK THIS OUT: Recent additions to the high-tech cleaning brigade include robot mops, such as the iRobot Braava, and window cleaners. If you dislike climbing ladders encumbered with window-cleaning gear, the Winbot, Hobot or RobotZoo's Gecko or Glider may be your salvation. They scoot around automatically or by remote control, in most cases sticking to windows by motorised suction and cleaning with microfibre pads.