How much does a boiling water tap cost to run

When it comes to running them, boiling water taps do not run up a bill any higher that a kettle - sometimes, it's even less! It is said that the average kettle costs around 2.5p to boil - with 40% of us boiling 5 times a day or more.
In contrast, the most efficient boiling water tap claims it costs just 3p to run per day! Most of us also tend to overfill our kettles, or even boil it twice if we have forgotten about it. This leads to lots of wasted energy and water. Your tap solves this problem, allowing you to use just as much as you need - making them more energy efficient, too.
There is one more cost to factor in with a boiling water tap, too. To prevent limescale build up, they require a filter to keep themselves clean. This needs replacing every 6 months or so.