Temperatures have plunged across parts of the UK and many homes will be wondering how they can run their central heating in the most cost-effective way.
When it comes to heating our homes, we all have differing opinions on when to turn the heating on, when to turn it off, how high or low the temperature should be, and how long the heating should be on for each day.
However, one question which usually comes up in conversations about central heating, and is a highly debated topic.
