Suction power is excellent and you get oodles of extras in the box, including a smaller head and microfibre attachment. However, what pushes the Bosch behind the Karcher and Vileda in our list is its failure, reported by some users, to clean quite as well to the very edges of your windows. If you need maximum run-time, the WV6 Plus N is our top choice. It has a huge 100-minute battery life, along with Karcher’s edge guidance system and battery indicator. It’s worth noting that the WV6 Plus N doesn’t have a removable battery, however, so if that’s important to you go for the WV5. Keep in mind that window vacs are typically only useful for cleaning ground floor windows. Extension poles can help reach higher conservatory glass or patio doors, but they are difficult to use on first floor windows without a ladder (which comes with its own dangers.) Of course, they are also great for cleaning shower screens, shower doors, and car windows. Each model also has various versions. The WV2, for example, is available in Basic, Plus, and Plus N Yellow versions.

Not sure which Karcher window vac to buy? In this article, we review the company’s WV range of home window vacs to help you make the right choice. We’re big fans of the WV2 Plus N Yellow. For most households, it provides the best value of any models in the WV range. If you don’t need a replaceable battery or edge guidance system, it provides better value than the WV5. As with all the WV range, the WV2 Plus N Yellow is great for cleaning windows, tiles, mirrors and other surfaces around the home. It’s relatively lightweight, includes a spray bottle kit for the cleaning solution, and is simple to empty. If the WV5 is the most advanced Karcher window vac, the WV2 Plus N Yellow provides the best balance between performance and affordability. It’s not the cheapest – that title goes to the WV1 – but has a 35-minute run-time, two blades and excellent window cleaning performance. When fully charged, the battery life of the WV2 is 35 minutes, enough window cleaning time for the average family home. An LED display lets you know when it's time to recharge the batteries. A full battery recharge from empty takes up to minutes depending on the model.For best results, use with Karcher cleaning agents. These are eco-friendly and bio-degradable and cut powerfully through grease, dirt, insects and the drips and streaks left by water without damaging the surface. Among its many included accessories are a smaller 170mm suction head for hard-to-reach areas and a microfibre attachment to spread detergent on your windows. There’s a built-in LED battery indicator and you can buy additional batteries so that you’ve always got a fully charged one ready to go. We think the #1 model is the WV5 Plus N. It has a 35-minute run-time, along with several other useful features that aren’t included on cheaper models. If you’re looking for the best value, however, then the WV2 Plus N is a great choice – especially if you don’t need a removable battery. None of that would matter if the Karcher didn’t clean windows brilliantly – and that’s where it really excels. Suction is strong and efficient right across the nozzle, so you can clean and dry into the silicone seal around your windows. The finish is about as streak-free as a window vac can achieve, although you may want to give your glass a final buff with a dry kitchen towel.

The cheapest WV vacuum cleaner is the WV1. While it doesn’t include many of the features found on the WV5, it provides great value for money and is perfect for smaller homes. Karcher has recently upgraded the WV2 to have a 35-minute run-time. This equals the WV5, which is another reason why we recommend the WV2 for most people. The lithium-ion battery also means it doesn’t lose suction power as the charge runs out. We select top-selling window vacs from leading UK retailers and put them through a string of tough tests to find out which are the best. Smaller Suction Blades. Some models (such as the WV5 Plus N) come with both a large and small blade, but Karcher also sells blades separately.So, while all WV models provide excellent performance and value for money, make sure you read each review to choose the right model for your requirements. If You’re in a Hurry… There are several key differences between the WV1 and WV5 though. The WV1 only has a 25-minute run-time and no option to swap the battery, so it may not be the right choice for cleaning lots of windows at the same time. It also only has a single 250mm cleaning head – the smaller 170mm head isn’t included. Extension Poles. These attach to the body of the window vac so you can clean taller windows without a ladder. If you have skylights or large windows, an extension pole is a useful accessory to buy. Karcher window vacs – also known as the WV range – are amongst the top products on the market. All WV models are powerful, come with lithium batteries to prevent suction loss, and are great for streak-free windows, tiles and mirrors. Log in now or join Which? to see our full results and find out if any Karcher window vacs are good enough to earn our Best Buy recommendation.