“In short, open windows when the temperature inside the house becomes greater than the external temperature, otherwise keep the windows closed,” he explains.

After two summers of experimenting, I am a firm believer in closing windows and blinds to keep the house cool when it is hot outside. But many people will resist.

Apple Mac computers offer a range of options for managing windows, and the process can be a bit confusing for newcomers. Here's our guide to closing, maximising and minimising apps and windows in ...

UK households should close windows in some parts of the house but open others on Monday and Tuesday.