Energy Saving Tips #1
Reducing your combi boiler flow temperature to 60C could save you about £100
If you have a combi boiler, try reducing the flow temperature for the water heating your home to 60C. This is the temperature of the water the boiler sends to the radiators.
A higher temperature will heat your home faster, but it could also mean higher bills.
That's because combi boilers tend to capture and recycle heat less efficiently at higher temperatures - meaning it requires more gas to heat your home.
If you have a conventional boiler (ie a system with a hot water tank), you could try setting it to 65C. It's important not to set it any lower as it could create a health risk - legionella bacteria could develop in the water.
If you want to consider adjusting the flow temperature, the Energy Saving Trust has more information and the Nesta charity has a guide to walk you through the process.
If you rent your home you might want to check with your landlord before making changes.
How this saving is worked out: CAR modelled the saving for reducing the temperature of combi boilers from 75C to 60C. It found this would save 8% on an average annual gas bill - about £97. It suggests 38% of homes in the UK could save money with this measure. The study was carried out in 2022.
