Reviewed by the Quel Tap product team. Last updated: September 2026.
Quick answer
For most households, a boiling water tap wins on convenience alone and, over time, on cost too, as the standby energy it uses tends to be outweighed by the water and energy a kettle wastes through overfilling. It also frees up the worktop space that a kettle, a filter jug, and sometimes a sparkling water machine would have otherwise occupied. For light, occasional use, a kettle can still be the more sensible choice. Ultimately, the decision usually comes down to four things: cost, convenience, space, and how much waste you’d rather cut out of the picture.
| Aspect | Kettle | Boiling water tap |
|---|---|---|
| Speed | Takes around 2-3 minutes to boil | Seconds: boiling, filtered, chilled, and sparkling water on demand |
| Running costs | A few pence per boil, more when overfilled | Small standby cost, offset by less waste |
| Worktop space | Takes up its own spot | Built into the tap and readily available |
| Water wasted | Commonly overfilled and tipped away unused | Draws only what is needed |
The real cost comparison
A full kettle boil costs around 7p, according to the Energy Saving Trust, but most of us don’t boil precisely what we need. A boiling water tap works differently: rather than heating a full kettle from cold each time, it keeps a small reserve hot and ready, topping up the temperature as water is drawn off. Based on Quel Tap’s own published figures for the 2.4 litre boiler, that standby cost works out to roughly £71 a year in electricity, or around £183 a year once filters are included; the full working’s out is set out in Boiling Water Tap Running Costs: What You’ll Actually Pay Per Year blog.
Where it’s worth being honest: if your household boils the kettle once or twice a day, a kettle and a boiling water tap will likely cost about the same to run once that standby energy is factored in. The clearer savings show up with frequent use, households making tea and coffee throughout the day, or regularly using boiling water for cooking. We’ve gone into the full cost breakdown, model by model, in our Are Boiling Water Taps Worth It? Blog.
Convenience: the everyday rhythm
A kettle asks you to plan a little, requiring you to fill it, switch it on, and wait. A boiling water tap removes that gap entirely. Water arrives at the temperature you need, the moment you ask for it, whether that’s one mug or a full pan for pasta or vegetables. There’s no re-boiling because the water’s gone lukewarm, and no guessing how much to fill it up.
It shows up in smaller moments too: filling up a teapot, a dinner that needs topping up right now rather than in two minutes, a hot water bottle filled before bed. It also shows up in busier ones, like when a kettle only boils once at a time, so three people wanting tea before work means either three separate boils or one large one that half gets wasted. A boiling water tap doesn’t have that bottleneck; the next person just turns the handle. None of this is dramatic on its own, as together, it adds up to a kitchen that moves a little more calmly.
Space: what you get back on the worktop
A kettle takes up its own space on a worktop. So does a filter jug, usually in the fridge. A boiling water tap folds those functions into one kitchen fixture that was already there, which means less to plug in, less to refill, and less counting how many appliances are battling for the same stretch of surface. For anyone planning a kitchen refit, it’s also one less appliance to design storage around from the outset.
The sustainability angle
Kettle overfilling isn’t just a habit that costs individual households money, at a national level, it adds up to something much more significant. The Energy Saving Trust has found that overfilling kettles wastes an estimated 70 million litres of water in the UK every single day, boiled and then poured away unused. A boiling water tap reduces that particular waste by design: since it dispenses only the amount drawn off, it avoids the equivalent of filling a kettle for one mug and pouring away the rest, on top of its own small, continuous standby energy use.
There’s a quieter angle too, in how often each appliance gets replaced. Kettles are among the small kitchen appliances people go through fairly often, and limescale build-up is a common reason they stop working well before a household is ready to replace them. Material Focus, the UK’s electricals recycling body, counts kettles among the small appliances that make up the country’s fastest-growing waste stream. A Quel Tap boiler is backed by an up to 5-year warranty and built to last considerably longer than that, meaning fewer units bought and fewer ending up as electrical waste over the years.
Choosing between a 4-in-1 and a 5-in-1 tap
Once the decision moves from “kettle or tap” to “which tap,” the next question is how many functions you’ll actually use.
A 4-in-1 tap, like the Quel Classic, Quel Digital or Quel Ultra, will give you filtered boiling water, filtered cold water, and standard hot and cold mains water, all from one tap. A 5-in-1 tap, like the Quel Digital Fizz, adds chilled and sparkling water on top, so it replaces a sparkling water machine as well as the kettle and filter jug.
| Aspect | 4-in-1 tap | 5-in-1 tap |
|---|---|---|
| Functions | Filtered boiling water, filtered cold water, as well as standard hot and cold | Filtered boiling water, chilled water, chilled sparkling water, as well as standard hot and cold |
| Replaces | The kettle and filter jug | The kettle, filter jug, and sparkling water machine |
| Best for | Households mainly wanting an end to waiting for the kettle and jug refilling | 4-in-1 benefits, plus households also working through bottled or canned sparkling water regularly |
| Price starts from | £499.99 (Quel Classic) | £1,249.99 (Quel Digital Fizz) |
Prices shown are standard prices, correct as of September 2026. Promotional prices may be available from time to time, so make sure to check the individual product pages for any current offers.
If it’s just the kettle and the jug cluttering the worktop, a 4-in-1 does the job completely, at the lower price point. If sparkling water is already part of the weekly shop, a 5-in-1 tends to earn back that difference in convenience fairly quickly, on top of cutting down on cans and bottles.
The everyday result
A kettle isn’t a bad appliance for a household that barely uses it, and it may genuinely remain the cheaper option, and there’s no need to pretend otherwise. But for a kitchen where the kettle’s on four or five times a day and the worktop’s more crowded than anyone would like, a boiling water tap tends to win on the things that matter day to day: less waiting, less waste, and a calmer kitchen. It’s part of the reason why Quel Tap holds a 4-star average across more than 800 Trustpilot reviews.
If this is the stage you’re at, it’s worth browsing our range of boiling water taps to see which model fits how your household actually uses water, or reading how a boiling water tap actually works for a closer look at what’s happening under the sink.
Frequently Asked Questions (FAQs)
Is it worth switching from a kettle if I only make one cup at a time?
It depends on frequency more than quantity. If that one cup happens several times a day, the convenience and the running-cost balance both tend to favour the tap. For genuinely occasional use, a kettle can remain the simpler choice.
Can I keep my kettle as well as installing a boiling water tap?
Yes, there’s no need to choose one exclusively. Some households keep a kettle for occasions like filling a hot water bottle or a large teapot, and use the tap for everyday cups and cooking.
Which is better for a small kitchen, a 4-in-1 or a 5-in-1?
Either works from a space perspective, since both replace the kettle and filter jug with the tap you already have. The deciding factor is usually whether sparkling water is part of your routine, and if it is, a 5-in-1 removes a separate machine too.
Does a boiling water tap use more electricity overall than a kettle?
Not typically, for regular use. It draws a small amount of standby power continuously, but this is generally offset by no longer overfilling and reboiling, which is where most kettle energy is actually wasted.