Turning your combi boiler flow temperature down to 60°C could save you up to £100 a year. Flow temperature is the temperature of the water that your boiler sends to radiators. Reducing flow temperature isn’t the same as lowering your thermostat and won’t noticeably reduce the temperature of your home but may increase the time it takes to reach the target temperature on your thermostat.
If you are over 65, or have pre-existing health conditions, you may want to set a slightly higher flow temperature of 65°C to ensure your home warms more quickly.
Nesta have more information on lowering your combi boiler flow temperature setting – take their Money Saving Boiler Challenge
