Last updated: November 2018.
Please note that this product was purchased by MyCleanHomeGuide and was not supplied by Karcher.
UPDATE: Karcher have recently released a WV Anniversary Edition of the window vac. This is to celebrate 10 years since the launch of the original window vac (cannot believe it was that long ago!).
We have not tested this version yet but it looks like this is a WV5 Premium model with a different colour scheme. So you get the two different suction head widths and the rechargeable battery but the great thing is that this model is selling for around the same price as the lower spec WV2 Plus. Therefore this WV Anniversary Edition model gets our "best buy" recommendation but we're not sure how long it will be around for.
If you are looking for a window vac, you can’t go far wrong with the Karcher range. Karcher have three models/kits to choose from; the entry (and cheapest) WV1, mid-range WV2 Plus and range-topping WV5 Premium. Retail prices range from £40 to £80 (although it’s well worth shopping around for the best prices).
The table below shows the comparison between the different Karcher window vac models.
Last update on 2019-09-22 / Images from Amazon Product Advertising API
In a hurry? Watch our in-depth video review of the Karcher WV2 Plus Window Vac
The model we reviewed in detail was the Karcher WV2 Plus model. The Karcher window vac range currently has 3 models and the WV2 Plus sits in the middle of this range. The RRP of this model is £60 (we paid £50 from Amazon). The WV1 is £10 cheaper but is the old model and does not come with the spray bottle.
The range topping WV5 Premium is £30 more expensive and for this you get an additional smaller suction nozzle and the battery can be removed and replaced with a spare charged battery, although the charging station and additional battery cost nearly £50.
So, what can the Karcher window vac be used for? The main use is for cleaning windows but it can also be used for cleaning shower doors and removing condensation from windows. Another use is cleaning up liquid spills.
What’s in the box?
The WV2 Plus is supplied with the main vac unit, a 11″ (28cm) wide suction blade head, a spray bottle/microfibre cleaning head tool, charger plug and a small sample sachet of cleaning solution. The suction blade is really easy to click into the body and overall the unit is quite light and easy to handle. There is an easy to reach power button with LED indicator light on the back of the main unit.
The water collection bottle can be easily emptied by undoing the rubber bung and the whole bottle unit can be removed for cleaning (although you have to detach the vac head to do this).
We found that the spray bottle/cleaning head tool was a little bit fiddly to put together and on the first attempt we did not screw the trigger head on correctly and ended up with a wet floor. The water bottle also seems to have a small capacity but we managed okay on our small window cleaning test. The cleaning cloth is attached by Velcro so can easily be removed for washing (in a washing machine).
Test no.1: Window cleaning
After fully charging the WV2 Plus for around 2 hours we set to work cleaning some windows (a set of small French doors). It took around 2 minutes to clean the windows which involved first spraying with the cleaning tool then going over a couple of times with the vac.
The spray tool is very to use and the vac did a good job of cleaning up the water first time and we only had to re-do certain areas. We only used washing up liquid in the cleaning bottle but overall the windows looked clean and streak free when we’d finished.
We also found that the window vac is relatively quiet to use as the motor does not generate too much noise.
Test no.2: Removing water from a shower door
Having had the Karcher Window vac for a couple of weeks now we’ve found that one of its most useful applications is in the bathroom. It gets put to use after the shower has been used for removing water from the shower door and tiles and also removing condensation from the large mirror we have above the sink.
In the quick shower door cleaning test it took well under 1 minute to remove all the water from the door. Previously we would have used a cloth to do this, so using the WV2 Plus was much easier.
Test No.3: Cleaning up spills
Another good use for the Karcher Window Vac is cleaning up liquid spills from hard floor surfaces, such as laminate, tiles or hardwood flooring. For this test we just used water on a laminate/tile floor surface and the window vac handled this with ease. We were surprised to find that the floor was almost dry to the touch after use.
If you were to clean up other liquids, such as milk for example, then you would need to remove the water collection bottle from the main unit to give the bottle a good rinse out.
Karcher have a strategy of offering “basic” products and then “premium” versions with extra (admittedly useful) accessories; this is common on their pressure washer range as well as their window vac range.
The WV2 Plus and WV5 Premium window vac models pretty much have the same base unit, the only difference being that the WV5 Premium has a removable rechargeable battery with extra running time. The WV1 uses the older, bulkier and heavier, base unit.
The difference is mainly in the accessories. We would honestly avoid the base WV1 model as it only comes with as standard wide nozzle and does without the cleaning tool (plus it’s the old base unit). The best bet is the WV2 Plus that we tested as this includes the cleaning trigger bottle & pad.
The WV5 Premium does have its longer running time and an additional smaller suction nozzle but in everyday situations these are features you can easily leave without, especially as its around £20 more expensive that the WV2 Plus.
Our recommendation: Go for the WV2 Plus as often this will only cost slightly more than the base WV1 model but is the more modern version and includes the very useful cleaning tool.
There are several accessories available for the Karcher window vac including replacement pads, belt holders, cleaning liquid and extra battery chargers.
However, perhaps the most useful accessory is the extension pole set for cleaning windows.
The set consist of 2 extending poles; one for the window vac and a separate one that has a washable cleaning head attachment. Each pole is 1.2 metres in length but can be extended to 1.9 metres. Your Karcher window vac can be securely mounted on the base plate and attached with the rubber strap.
These high quality extension poles allow you to clean taller or hard to reach ground floor windows and are ideal for cleaning conservatory glass. If you are looking to use on 1st floor windows then you will definitely need a step ladder to gain better access. The Karcher window cleaning pole set has an RRP of around £35 so makes a great purchase if you plan to regularly clean windows.
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