How To Increase Boiler Efficiency and Save Money

James Elston
Written by James Elston
Updated on 5th December 2023
Posted on 4th December 2023
Topic: Boiler Advice
How To Increase Boiler Efficiency and Save Money

Boilers are an essential part of our daily lives, but they can also be very expensive, particularly in terms of energy costs.

This how to increase boiler efficiency guide will go over methods to increase your boiler’s efficiency and cut costs in an effort to lower those costs. You’ll lessen your environmental effect while simultaneously saving money.

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What is efficiency?

How well a system or process uses its resources to create a desired output or result is known as efficiency. Efficiency is often measured as the usable output to total input ratio, and it is frequently stated as a percentage.

Efficiency in the context of boilers refers to a measurement of how well the boiler transforms fuel into thermal energy. A more effective boiler will use less fuel to provide the same quantity of heat, lowering energy expenditures and having a less negative impact on the environment.

How is efficiency measured?

A boiler’s efficiency can be determined in a number of ways, but the most popular one is to calculate the annual fuel utilisation efficiency (AFUE) rating. Higher ratings indicate greater efficiency. This number shows the percentage of fuel that is turned into heat.

How we chose the best strategies to boost your boiler’s efficiency and save money:

We used a combination of expert knowledge and research on the best ways to increase boiler efficiency to rank the topics for “Proven Ways to Increase Your Boiler’s Efficiency and Save Money.”

Secondly, we compiled a list of methods that may be utilised to raise the boiler’s efficiency, such as routine maintenance, upgraded insulation, digital controls, burner setting optimisation, and better water treatment. The most efficient and widely used of these tactics were then chosen after we conferred with experts in the field and evaluated the most recent research.

Based on this analysis, we ranked the solutions according to their viability and efficacy. We took into account elements including the cost and difficulty of implementation, the potential energy savings, and the effect on the efficiency and life of the boiler.

Eventually, we chose the best methods that, in our opinion, have the best chance of increasing boiler efficiency and reducing costs. The most efficient and practical strategies are listed first in the guide’s presentation of these tactics in terms of priority. To assist readers in choosing which techniques to prioritise depending on their particular needs and budget, we also included information on the possible energy savings and expected expenses for each strategy.

Here are the best-proven strategies to boost your boiler’s efficiency and save money:

Annual boiler servicing and cleaning

Regular boiler servicing, maintenance and cleaning are essential for keeping your boiler running efficiently. Over time, dirt and debris can build up, causing your boiler to work harder and use more energy.

An annual boiler service is usually part of a manufacturer’s warranty terms and conditions. This is to ensure that the boiler is kept in the best condition possible and also it is well known that paying the small boiler service cost can make a boiler more efficient.

Tips for maintaining and cleaning your boiler:

  • To make sure your boiler is operating effectively and to find any problems, schedule annual boiler service with a suitably qualified professional such as a Gas Safe engineer.
  • To keep the air flowing smoothly, check and replace the air filter frequently.
  • In order to stop dust and debris from entering the system, clean the exterior and vicinity of the boiler.
  • Regularly check the water levels and water pressure to make sure the boiler is working at the proper pressure.

Benefits of maintaining and cleaning your boiler:

  • Lower energy costs and improved energy efficiency.
  • Your boiler will last longer since it will be less likely to malfunction or sustain damage.
  • Increased safety since regular maintenance can spot and take care of possible risks.
  • Better interior air quality as less dust and debris is in the air after cleaning the boiler.

Upgrade your insulation

Your home’s insulation can have a big impact on how efficiently your boiler operates. A home with poor insulation can lose a lot of heat, which forces your boiler to operate longer and harder to maintain the proper temperature.

Tips for improving home insulation:

  • Find out which areas of your home, such as the attics, walls, and floors, need insulation.
  • Use fibreglass, cellulose, or spray foam insulation to fill up cracks and seal air leaks.
  • Consider upgrading to windows and doors that use less energy.
  • Engage a professional to perform an energy assessment and make modifications to the insulation.

Benefits of improving home insulation:

  • A higher level of comfort and lower energy costs as a result of less heat loss.
  • Your heating system will last longer because it won’t have to work as hard to keep the temperature constant.
  • Lowered environmental impact and carbon footprint as a result of using less energy to heat your home.
  • Better indoor air quality since insulation helps cut down on air leaks and draughts that let contaminants into your house.

Install a programmable thermostat

A programmable thermostat allows you to set different temperatures for different times of the day, reducing the amount of energy you use. 

Tips for using a programmable thermostat:

  • To learn how to set up and use the thermostat, please read the handbook.
  • When you’re gone from home or asleep, set the thermostat to be cooler; before you get up or get home, set it to be warmer.
  • Manually adjust the temperature as necessary, but try to stay away from making significant changes that will make your heating or cooling system work harder.

Benefits of using a programmable thermostat:

  • Decreased energy usage and electricity costs.
  • Increased comfort and convenience due to the thermostat’s automatic maintenance of the preset temperature.
  • Your heating and cooling system will last longer because it won’t have to work as hard to keep the temperature constant.
  • As you use less energy to heat or cool your home, you have a smaller carbon footprint and a smaller environmental impact.

Bleed radiators

Over time, air can build up in your radiators, which can reduce their efficiency. Bleeding your radiators will release any trapped air and improve their heat output.

Tips for bleeding radiators:

  • Before beginning, turn off your heating system.
  • To open the valve at the top of the radiator, use a flathead screwdriver or a radiator key.
  • Have a towel or container nearby to catch any leaks.
  • Close the valve after the water begins to flow steadily and the air stops hissing.

Benefits of bleeding radiators:

  • Enhanced heating performance and quicker home warming.
  • Greater heating distribution throughout your house.
  • Lower energy costs because the heating system won’t have to work as hard to keep the required temperature.
  • Your heating system will last longer because it won’t have to work as hard to remove trapped air.

Check your boiler’s pressure

To increase your boiler’s efficiency and save money, it is crucial to incorporate proven strategies such as checking your boiler’s pressure regularly. Monitoring your boiler’s pressure gauge to spot potential problems is one of the key maintenance chores. You can ensure that your boiler is running properly, eliminating energy waste, and lowering your energy bills by maintaining the pressure within the recommended range.

Tips for Maintaining Your Boiler’s Pressure:

  • Find the pressure gauge: The pressure gauge is frequently found on the front panel of the boiler, close to the control.
  • Watch the gauge: Examine the gauge to see what the pressure is; it should be between 1 and 1.5 bars, but makes and models can vary.
  • Verify the manual: Instructions for pressure adjustment can be found in the manual.
  • Increase the pressure by opening the filling loop valve and adding water if necessary.
  • Get expert assistance: If you are unsure how to check or adjust the pressure, contact a heating professional.

Benefits of Checking Your Boiler’s Pressure:

  • Efficiency: Maintaining pressure reduces costs and saves energy.
  • Safety: Pressure monitoring helps to avoid mishaps.
  • Cost-effective: Repair expenses are reduced when problems are discovered early.
  • A longer lifespan is achieved by maintaining your boiler and avoiding replacement.

Insulate pipes

Insulating pipes is one of the proven strategies to boost your boiler’s efficiency and save money. Here are some tips and benefits of insulating pipes:

Tips for Insulating Pipes:

  • Find the pipes that require insulation; in particular, hot water and steam pipes should be insulated.
  • Select the appropriate insulation type; the most popular types are foam, mineral wool, and fibreglass.
  • Accurately measuring the pipe diameter will ensure that you purchase insulating material of the proper size.
  • Employ high-temperature insulation; this is crucial for pipelines that transport steam or extremely hot water.
  • Effective insulation sealing will stop heat loss.

Benefits of Insulating Pipes:

  • Limits heat loss – By keeping heat inside pipes, you can reduce the amount of energy your boiler must use to maintain the correct temperature.
  • Efficiency is increased since your boiler uses less energy when it isn’t working as hard, which results in cheaper energy costs.
  • Reduces the possibility of pipe condensation – in the absence of insulation, condensation can form on the pipe’s surface, leading to corrosion and a shorter lifespan.
  • Reduces noise – Insulation can assist in reducing the noise that hot water or steam running through pipes makes.
  • Lowers carbon footprint – By using less energy to heat your home, you are lessening your carbon footprint and promoting a more environmentally friendly world.

Clean boiler housing

Cleaning the boiler housing is another proven strategy to boost your boiler’s efficiency and save money. Here are some tips and benefits of cleaning the boiler housing:

Tips for Cleaning Boiler Housing:

  • Before cleaning the boiler housing, make sure it is turned off and has had time to cool.
  • Dust, filth, and other material can be removed from the boiler housing using a vacuum cleaner or a soft-bristled brush.
  • Remove any tenacious grease or grime by using a cleaning agent suitable for the boiler housing.
  • After cleaning, wipe off the boiler housing with a wet cloth to remove any remaining cleaning solution.
  • Examine the housing – Check the housing for any corrosion or wear and tear, and take immediate care of any problems.

Benefits of Cleaning Boiler Housing:

  • Efficiency is increased since heat is transmitted more effectively and wastefully when the boiler housing is clean.
  • Durability is increased through routine cleaning, which helps prevent corrosion and other types of damage that could reduce the boiler’s lifespan.
  • A clean boiler is less likely to experience malfunctions or breakdowns, which can be expensive to repair.
  • Poor indoor air quality can result from a dirty boiler’s release of hazardous particles into the air. Hence, the air quality is enhanced.
  • Savings – Over time, an efficient boiler can enable you to reduce your energy expenditures.

Consider upgrading to a high-efficiency boiler

If your boiler is old, it may be worth considering upgrading to a high-efficiency boiler. High-efficiency new boilers are designed to use less energy to heat your home and hot water, which can significantly reduce your energy bills.

Tips for upgrading to a high-efficiency boiler:

  • Discover the high-efficiency boiler that best meets your requirements by doing some research on the many models and types out there.
  • The connections to your hot water and heating systems should be secure. Get a professional to install the new boiler.
  • Consider upgrading the radiators and thermostats in your heating system to increase energy efficiency.

Benefits of upgrading to a high-efficiency boiler:

  • Decreased energy use and costs for energy.
  • increased comfort since high-efficiency boilers can deliver hot water and heat more reliably.
  • Your heating system will last longer since high-efficiency boilers are built to last longer than previous ones.
  • High-efficiency boilers consume less fuel to heat your home and provide hot water, reducing their carbon footprint and environmental impact.


Improving your boiler’s efficiency can have significant benefits for your home, your wallet, and the environment. By following the tips outlined in this post, you can reduce your energy bills, increase the lifespan of your heating system, and reduce your carbon footprint.

Written by
James Elston
James Elston Director Of Boiler Central
Posted on: 4th December 2023
Topic: Boiler Advice

James Elston is our resident boiler replacement and heating expert here at Boiler Central. With over 20 years experience in the boiler installation industry, James ensures that he knows everything there is about our Gas Safe boiler installations, energy saving and home heating solutions. This can be from simply procuring the latest best combi boilers, to reviewing and ensuring that Boiler Central maintains the highest standards across our boiler installation company.

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