Do you have a combi boiler? Cut your energy use by simply adjusting your boiler settings
Over 15 million households in the UK have a combi boiler – if we all work together to turn down our boilers, then we can make a huge difference during a time when we are hoping to reduce our energy bills, lower our energy use and prevent energy loss.
Did you know you could cut your gas use by an average of 9% by changing a single setting on your boiler?
Read on to find out how to make the change and about the benefits of our new scheme.
Project partners, Nottinghamshire County Council, have invested £150,000 in to this scheme, which forms part of their Cost of Living support programme for residents.

Book your FREE home visit today
If you live in Nottinghamshire and have a condensing combi boiler, our team can visit your home for FREE to make this change for you.
A condensing combi boiler heats both your water & your central heating all from the same unit. They can be identified by 5 copper pipes coming out the bottom of the boiler.
Our service is suitable for anyone living within the Nottinghamshire County Council area, particularly if you have any health conditions; have difficulty accessing your boiler; or are concerned about making any changes to your boiler. Our team of specialists are on hand to explain the process and answer any questions that you may have.

How do I optimise my boiler?
Start by following our guide below..
Click the button below to follow our handy step-by-step guide on how to make the recommended setting.
The form explains how to change the flow temperature for each type of boiler and allows us to measure how many people are making a positive impact by lowering their carbon.

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Watch the demonstration video below
Frequently Asked Questions
A condensing combi boiler heats both your water & your central heating all from the same unit. They can be identified by 5 copper pipes coming out the bottom of the boiler.
By reducing the flow temperature, you will be using less gas to heat your home because you will be heating the water that flows between the boiler and the radiator to a lower temperature.
Most boilers have an 80/60 flow and return temperature, sending a temperature of 80°C to your radiators, giving off 20°C to heat your home and returning 60°C to your boiler. By reducing the flow temperature, you can achieve the same effect without losing that 20°C.
Don’t worry, this doesn’t affect the temperature of your hot water and doesn’t mean you will have to take cold showers, it means that you will be setting your boiler into ‘condensing mode.’
Condensing mode is when the boiler starts to recover its lost heat, running more efficiently. This means that you will be setting your boiler to run at the efficiency rating that many modern combi boilers advertise.
Reducing the flow temperature can achieve significant carbon reductions and lower running costs by an average of 9% on gas bills without losing warmth. Based on Ofgem’s average energy bill of £3549, of which £2,220 will be for gas.
You shouldn’t feel a difference. Your radiators may feel cooler to the touch, but this is because the water being sent to the radiators is cooler. The radiators will still heat your home effectively; it may just take a little longer. For many, this is not a noticeable difference, and can be easily resolved by setting your heating to come on 15-30 minutes earlier than before.
Below you can view or download the Let’s Optimise your Heating booklet for your reference.
This scheme is funded by:
