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. 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. 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.

One of the most important additions is the removable battery. The WV5 is the only WV window vac to include this feature, which allows you to swap the battery and continue cleaning (you’ll need to buy another battery though). The edge guidance function, which is effectively an adjustable roller so you can get right up to the edge of frames, is another welcome addition. 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.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… Extendable pole: A few models on our list come with, or are compatible with, telescopic or multi-section poles to help you reach high windows and skylights without wobbling up a ladder. On the downside, a pole can make the vac hard to control, especially if it’s heavy. Interchangeable suction heads: Most window vacs come with a 280mm suction head as standard, but many include an additional smaller head for fiddly jobs such as leaded windows and front door panels. Pivoting suction heads can also help to get into awkward spots. The best window vacs you can buy in 2023 1. Karcher Window Vac WV5: Best all-round window vacuum cleaner

Cleaning windows can be a frustrating job – especially without the right tools. Drying a glass window pane with a cloth is likely to leave smears, but letting the window dry naturally causes streaks. For this reason, we recommend the WV2 Plus N for most people, as the smaller nozzle provides more versatility. And if you need a swappable battery and edge cleaning system, then the WV5 is clearly the superior vacuum. 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. While the regular vacuum cleaner market has plenty of competing brands, Karcher dominates window vacs in the UK. Their WV series is powerful, lightweight and easy to use – not to mention available for great prices. In fact, the company’s models currently occupy both #1 and #2 positions on our list of the best window vacs.Let’s start with the similarities between this model and the WV2. It features the same basic design, 100ml dirty water tank and LED charge display. The 250mm cleaning head does an excellent job of leaving streak-free windows and other surfaces, while the lithium battery doesn’t lose suction as it gets low on charge. Rechargable Battery: The rechargeable lithium-ion battery cleans up to 55 m² on a single charge - that's up to 45 windows