How to Make Your Central Heating More Efficient and Reduce Your Energy Bills

With heating accounting for a significant proportion of household energy use, even relatively small improvements to your central heating system can make a noticeable difference to running costs.

You don’t necessarily need a new boiler or expensive upgrades either. From adjusting your heating controls to improving how efficiently your radiators work, there are several practical ways to use less energy while keeping your home comfortable.

In this guide, we look at how to make your central heating more efficient, what temperatures to use and some of the most effective ways to reduce your heating bills.

1. Set Your Thermostat to the Right Temperature

Turning up the thermostat doesn’t make your home heat up faster. It simply tells the heating system to continue running until the higher temperature is reached.

For many households, a room temperature of around 18–21°C provides a comfortable balance between warmth and energy efficiency.

If your thermostat is regularly set higher than necessary, reducing it slightly can lower the amount of energy your heating system uses.

However, comfort and heating requirements vary between households, particularly for older people, young children and anyone with health conditions, so temperature shouldn’t be reduced simply for the sake of saving energy.

2. Check Your Boiler Flow Temperature

The temperature shown on your room thermostat isn’t the same as your boiler’s flow temperature.

Flow temperature controls how hot the water becomes before it travels from the boiler to your radiators. Many condensing boilers are capable of operating more efficiently at lower flow temperatures because this allows them to recover more heat from the gases produced during combustion.

If you have a modern combi boiler, you may be able to reduce the central heating flow temperature using the controls on the boiler.

The ideal setting depends on your property, radiator sizes and weather conditions, so don’t simply turn it down as far as possible. The aim is to find the lowest setting that can still heat your home comfortably.

If you’re unsure which control to adjust, check the manufacturer’s instructions or speak to a qualified heating engineer.

3. Use Your Heating Timer Properly

Leaving the heating running when nobody needs it wastes energy.

A programmer, timer or smart heating control allows you to schedule your heating around your normal routine. For example, you can have the house warm before you get up in the morning without leaving the heating running throughout the night.

Try to match your heating schedule to when the property is actually occupied rather than relying on the same settings throughout the day.

Modern smart controls can provide even greater flexibility, allowing heating schedules and temperatures to be adjusted from your phone.

4. Use Thermostatic Radiator Valves

Thermostatic radiator valves (TRVs) allow you to control individual radiators rather than heating every room to the same temperature.

Rooms that aren’t used regularly, such as spare bedrooms, can usually be kept cooler than living areas.

Reducing unnecessary heating in these spaces means your boiler has less work to do.

Avoid using a TRV as a simple on/off switch. Setting it correctly allows the valve to automatically reduce the flow of hot water through the radiator as the room reaches the desired temperature.

5. Bleed Your Radiators

Air can become trapped inside radiators and prevent hot water from circulating across the entire surface.

A common sign is a radiator that’s warm at the bottom but cold at the top.

Bleeding the radiator releases the trapped air and allows it to heat more effectively. If you find yourself repeatedly bleeding the same radiators, however, there could be an underlying issue with the heating system that needs investigating.

After bleeding radiators on a sealed system, remember to check the boiler pressure and refer to the manufacturer’s instructions if it needs adjusting.

6. Don’t Ignore Cold Spots at the Bottom of Radiators

A radiator that’s cold at the bottom but hot at the top can indicate a different problem.

Over time, corrosion and debris can create sludge within a central heating system. This can settle in radiators and restrict the circulation of hot water.

A heavily contaminated system may take longer to heat the property, create uneven radiator temperatures and place unnecessary strain on the boiler and pump.

Depending on the condition of the system, professional cleaning or a power flush may be recommended.

7. Make Sure Your Heating System Is Balanced

If some radiators become extremely hot while others struggle to warm up, your central heating system may need balancing.

Balancing adjusts the flow of water through each radiator so heat is distributed more evenly around the property.

A properly balanced system can improve comfort and help the heating system operate more effectively, particularly in larger properties or homes with radiators positioned at different distances from the boiler.

8. Keep Radiators Clear

Radiators need space to transfer heat effectively into the room.

Large sofas, curtains and other furniture positioned directly in front of a radiator can restrict the movement of warm air.

Where possible, leave some clear space around radiators and avoid covering them with clothes or other items.

If a radiator is installed on an external wall, suitable reflective radiator panels may also help reduce heat loss through the wall in some properties.

9. Stop Heat Escaping from Your Home

Improving the heating system itself is only part of the solution. If heat quickly escapes through the roof, walls, windows and doors, the boiler will need to run for longer to maintain the desired temperature.

Depending on your property, improvements could include:

• Loft insulation
• Cavity or solid wall insulation
• Draught-proofing doors and windows
• Double or secondary glazing
• Insulating accessible hot water pipes

Even relatively simple draught-proofing can help make rooms feel more comfortable and reduce unnecessary heat loss.

10. Have Your Boiler Serviced Regularly

An annual boiler service gives a qualified engineer an opportunity to check that the appliance is operating correctly and safely and identify potential problems before they develop into more serious faults.

A service isn’t a substitute for upgrading an old or inefficient heating system, but regular maintenance can help keep your existing boiler in good working order.

For gas boilers, servicing and repairs should be carried out by a Gas Safe registered engineer.

Is It Cheaper to Leave the Heating on All Day?

This is a common heating myth.

For most homes, leaving the heating running continuously isn’t the most economical approach. Your property constantly loses heat to the outside, and keeping it at a higher temperature for longer generally means replacing more of that lost heat.

Using heating controls to warm your home when it’s needed is usually a more sensible approach.

There are exceptions, particularly with different heating technologies and very well-insulated properties, so the best strategy depends on the heating system and building.

What Temperature Should Your Central Heating Be Set To?

There are actually two temperatures to consider.

Your room thermostat controls how warm you want the home to become, while your boiler flow temperature controls the temperature of the water travelling to the radiators.

For room temperature, many households find somewhere around 18–21°C comfortable.

The appropriate boiler flow temperature varies considerably depending on the heating system and property. Modern condensing boilers can often operate more efficiently at lower flow temperatures, provided the radiators can still deliver enough heat to warm the home properly.

When Should You Consider Upgrading Your Heating System?

If your boiler is getting older, frequently breaking down or struggling to heat your property efficiently, maintenance and adjustments may only go so far.

It may be worth asking a heating engineer to assess whether improvements such as new heating controls, upgraded radiators, system cleaning or eventually replacing the boiler could improve performance.

You don’t always need to replace the entire central heating system. Sometimes addressing a poorly performing component or improving the controls can produce a worthwhile improvement.

Making Your Central Heating Work More Efficiently

Reducing your heating bills isn’t simply about turning the thermostat down and putting on another jumper.

An efficient central heating system should deliver the right amount of heat to the right rooms at the right times while minimising wasted energy.

Start with straightforward changes such as reviewing your thermostat and timer settings, checking your radiators and keeping them unobstructed. If radiators heat unevenly, the boiler repeatedly loses pressure or the system takes a long time to warm up, it may be worth having the central heating inspected.

A properly maintained and correctly controlled heating system can help keep your home comfortable while ensuring you’re not paying for energy you don’t need to use.

Need Help With Your Central Heating?

If your central heating isn’t performing as efficiently as it should, 1st Clearflow provides professional central heating and plumbing services throughout the local area.

Whether you’re dealing with cold or unevenly heated radiators, poor circulation, an inefficient heating system or a problem that needs further investigation, our experienced team can identify the cause and recommend the most appropriate solution.

Our central heating services include:

• Central heating repairs and fault finding
• Radiator repairs and replacements
• Radiator bleeding and system balancing
• Power flushing and system cleaning
• Heating controls and thermostat installation
• Boiler servicing, repairs and maintenance
• Central heating system improvements and upgrades
• General plumbing repairs and maintenance

As a trusted local plumbing and heating company, 1st Clearflow combines local knowledge with experienced, professional workmanship, providing a responsive service and practical advice tailored to your property and heating system.

Rather than simply treating the immediate symptom, we can assess how your heating system is performing as a whole and identify issues that could be affecting its reliability, efficiency and ability to heat your home effectively.

If you’re experiencing central heating problems or would like to improve the performance of your existing system, contact 1st Clearflow today to arrange a visit and find out how we can help keep your home warm, comfortable and energy efficient.