We are often told to only use as much water as we need in a kettle and not to fill it to the top, but what are the potential annual saving in doing this. Well it takes roughly 4.5 minutes to boil a full (2 litre) kettle with a power rating of 3KW (kilowatts). The table shows how this converts to cost for a full and for a half kettle operated twice a day for a full year.
| Kettle | Annual Energy Use | Annual Cost |
| Full | 164 KWh | £ 22 |
| Half Full | 82 KWh | £ 11 |
Well There it is, a full year of operating a kettle in this way should save you about £ 7.75. Less than you might image but if you are a real tea fiend and boil it 4 times a day you would double the saving! Every little counts.
