A steam cleaner deep-cleans hard floors, tiles, grout, hobs and sealed surfaces using nothing but superheated water — no chemicals, just pressurised steam hot enough to lift grease and kill germs. The big design split is between machines with a pressure boiler, which build serious steam pressure, and simpler steam mops that trade power for speed and manoeuvrability. An extensive test of 38 steam cleaners sorted the best, and these are the top picks, checked against current UK prices.
What to Look For
Steam pressure and heat. A pressure boiler pushes steam out at up to 4 bar — the fiercest machine on test blew its jet out at 4.2 bar, where weaker units managed only 3.5 bar and the winner sits at 3.2 bar. The steam leaves the nozzle blisteringly hot, up to 150 °C on the strongest models, though it cools on the way down: some heads measured only 74 °C or 95 °C, and one that boasted 248 °F was really nearer 120 °C. Hotter, higher-pressure steam cleans deeper and sanitises better.
Boiler versus removable tank. This is the key trade-off. A sealed pressure boiler delivers the highest pressure but must cool before you can refill it, so you work in sessions; a removable or refill-during-use tank lets you top up on the fly but usually at lower pressure. A boiler model can take around 6.5 minutes to build pressure from cold, whereas a simple steam mop is ready in about 30 seconds, and the quickest in as little as 12 seconds.
Water capacity, wattage and cable. A larger reserve means longer between refills — and because 1 litre of water makes roughly 1,700 litres of steam, even a modest tank lasts a while. Higher wattage, from around 1500 W to 2200 W on the biggest units, heats faster and sustains steam better; and cable length varies more than you would expect, from a stingy 4 metres to a roomy 7 metres of reach, and the steam hose can be as short as 1.5 metres, so check both if you have a large room.
Accessories and handling. The floor tool matters most, and a quick-attach system such as Kärcher's EasyFix makes swapping the cloth painless. Look for brushes and detail nozzles for grout and taps, stepless steam regulation for delicate jobs, and a nimble, flat head that reaches into corners.
The Winner: Kärcher SC 2 Deluxe EasyFix
The Kärcher SC 2 Deluxe EasyFix (around £229.99) is the best for most people. It is beautifully made, comes with an extensive set of accessories, and — crucially — delivers powerful, even steam at 3.2 bar that makes light work of floors and tiles. It also holds the largest water reserve of the smaller machines. The one drawback is a fixed, non-removable water tank, so refills mean waiting for it to cool. But it costs far less than the bigger Kärchers while cleaning nearly as well, and that balance takes it to first place. Check the price on Amazon
Best Premium: Kärcher SC 5 EasyFix
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If you want the most capable machine, the Kärcher SC 5 EasyFix (around £379) is the top model. It musters a very high working pressure and a big steam volume, offers both very high and very low steam settings for precise control, and pairs a 2200 W boiler with the same excellent EasyFix accessories. It is expensive and takes a moment to heat, but for large homes or serious deep-cleaning it is the one to have. Check the price on Amazon
Best Alternative: Polti Vaporetto Smart 110 Eco
The Polti Vaporetto Smart 110 Eco (around £179) pulls off a rare trick: it combines a pressure boiler for proper steam power with the ability to refill during operation, so you get the pressure of a boiler without stopping to let it cool. Add a large water reserve and stepless steam regulation and it is a genuinely flexible choice. It is not cheap, but if constant refills annoy you, it solves the problem. Check the price on Amazon
Best Budget: Vileda Steam Mop Plus
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For a fraction of the price, the Vileda Steam Mop Plus (around £59.99) is the value pick. It is no technical showpiece — beyond stepless steam control there is little to adjust, and it is a pure steam broom with no extra tools — but it works, produces plenty of steam and is extremely manoeuvrable. Its triangular, flat head slips into every corner, which makes it a doddle for quick whole-floor cleans. Check the price on Amazon
Also Tested
The Hoover Steam Capsule CA2IN1D "2in1" is really more of a 10-in-1: no other machine on test packed in as much versatility at a sensible price, and its standout is a detachable handheld unit that works on its own for worktops and upholstery. It also has a long cable and a wall bracket. The downsides are a small water tank with a fiddly filling opening, and brushes that need an adapter. Frustratingly, this exact model is not currently stocked on Amazon UK, so there is no lookalike substituted in its place here — look to the wider Hoover steam range if the detachable-handheld idea appeals.
How to Choose
Decide how much power you need and how you like to work. For most homes the Kärcher SC 2 Deluxe EasyFix hits the sweet spot of pressure, build and price. If you deep-clean a big house, step up to the Kärcher SC 5; if endless refill waits drive you mad, the refill-on-the-fly Polti is the answer; and if you just want quick, cheap, chemical-free floors, the Vileda does the job for under a hundred pounds. Prioritise steam pressure and a good floor tool over gimmicks, and remember that a boiler needs a heat-up minute or two while a steam mop is near-instant.
Verdict
The Kärcher SC 2 Deluxe EasyFix is the steam cleaner to buy for most people at around £229.99: powerful 3.2 bar steam, superb build and a full accessory kit. Move up to the Kärcher SC 5 EasyFix (about £379) for the ultimate deep clean, choose the Polti Vaporetto Smart 110 Eco (around £179) for refilling without waiting, or save with the nimble Vileda Steam Mop Plus (around £59.99). Whichever you pick, a steam cleaner is the chemical-free way to get floors and tiles genuinely hygienic.
