The best time to put your heating on is generally when the outdoor temperature consistently drops below 15°C (59°F), which typically occurs in mid-October. The NHS and Met Office recommend turning on heating when temperatures fall below this threshold for health reasons. Many experts advise setting your thermostat to turn heating on in the morning before you wake and off before you leave the house, then back on before you return home to save energy and costs. Indoor temperature guidance suggests keeping rooms between 18°C and 21°C, especially for vulnerable or elderly people. If you feel cold inside or your home has poor insulation, it may be necessary to turn on heating earlier. Using draught excluders and wearing layers can help delay turning on the heating. Leaving heating on all day is usually unnecessary unless your home is very poorly insulated.