When a kettle boils, it doesn't immediately switch off. The longer it takes to do so, the more energy is wasted generating steam and depositing limescale.
How often do you overfill a kettle, making sure you have enough for your drink, but usually boiling far more than you need!
© Calomax Limited 2023 - Catering Hot Water Boilers. Registered in England No. 02617748 Registered Office: Lupton Avenue, Leeds, LS9 7DD VAT REG No. G.B. 168 9432 22