Glow-worm boilers: Everything you need to know

Glow-worm has been active within the heating industry for over 80 years and has throughout this time established a reputation for providing customers throughout the UK with reliable and energy-efficient products. A popular domestic heating manufacturer, Glow-worm aims to deliver boilers of high quality and exceptional performance capabilities.

If you’re looking for a boiler system that could provide an effective heating and hot-water supply, a Glow Worm boiler could be the best choice for you. Our HomeServe team could not only advise you of suitable choice for your home, but we could also conduct a professional installation of the Glow-worm boiler of your choice.


On this page we offer a comprehensive look at Glow-worm boilers, find out more about:


Why Choose Glow-worm?

The Glow-worm brand have a long and commendable track record of manufacturing top quality boilers for all types of households. They are viewed by some as being a pioneer within the heating industry, with it being claimed that they developed one of the first ever condensing boilers back in the 1990s. Established in 1934, the brand aims to produce straightforward, dependable heating systems designed with you in mind. Glow-worm designs their products to be easy to use and install; aiming to please not only their customers but also the engineers that install them.



Glow-worm Boiler Types

Glow worm manufactures a range of different boiler types with the aim of meeting the needs of a variety of different households. Boiler types include:

Combi boilers

Glow-worm combi boilers are manufactured to provide homeowners with both comfortable heating and instantaneous hot-water. Compact in size, these boilers could be particularly well-suited for homes where space is limited as no additional components such as tanks or cylinders are required. They could also be ideal for households that have 1 bathroom/shower room and a lower hot-water usage. Models include their Ultimate3 and Energy 35 Store combi boilers.

Regular/conventional boilers

Glow-worm’s regular boilers are designed to provide homes with effective heating and hot-water through using an additional hot-water cylinder and cold-water storage tank. These Glow-worm boilers could be ideal for your home if you already have a traditional form of central heating installed. These regular boilers tend to be suitable for medium-sized households that have numerous bathrooms and a higher than average need for hot-water.

System boilers

A Glow-worm system boiler could be a great choice for your home if you have a medium to large sized household with multiple bathrooms and a higher demand for hot-water. These boilers are designed to provide heating and hot water to your home, with the use of an additional sealed water cylinder. These boilers don't require any cold-water tanks as its major central heating components are already built in, potentially allowing you to save space!


We understand that it can be difficult to decide which Glow-worm boiler is best suited for your home, especially considering the diverse range of products available from the brand. In an attempt to make your decision slightly easier, here’s a brief list of what we believe to be some of Glow-worm’s top boilers:


  • Compact design
  • ErP A rating
  • Designed to have Ultra Quiet operations
  • 726mm x 418mm x 346mm (height x width x depth)
  • Typically an ideal choice for most smaller homes with lower demands for hot-water

Betacom3 24c

  • SEDBUK A rating
  • LCD Display Interface
  • LPG Compatible
  • 900mm x 500mm x 390mm (height x width x depth)
  • Typically a suitable choice for most smaller homes that have a lower demand for hot-water

Easicom3 28

  • Inbuilt timer
  • Modern, bright, LCD display
  • Compact
  • 740mm x 418mm x 300mm (height x width x depth)
  • Typically best suited for most smaller homes with lower demands for hot-water


  • Compact, smart design
  • Designed with an easy to use Interface
  • Inbuilt filling loop
  • 740mm x 418mm x 300mm (height x width x depth)
  • Typically best suited for most smaller homes with lower demands for hot-water


Cost of installing a Glow-worm boiler

The cost of getting a new Glow-worm boiler installed into your home can vary and tends to depend on factors such as the type of boiler you want, its size and any additional parts and labour costs incurred. Boiler installations may indeed seem expensive at first glance, however it is key to bear in mind that it is the quality of your home heating that you are paying for. The right boiler could significantly enhance the levels of comfort experienced by you and your family. It is also important for you to ensure that a Gas Safe registered engineer conducts the installation, as this could ensure that the job is completed thoroughly and efficiently. Here at HomeServe, all of our engineers are Gas Safe registered, so it could be easy for us to send one of our local, expert engineers to your home.

When considering the overall cost of your new installation, it is important to remember that you are paying for the quality of your home heating. A Homeserve Gas safe registered engineer could provide you with a first-class installation service and a product that will deliver quality heating to your home.

Through our finance provider, Shawbrook Bank Ltd, you could also access a finance package that works for your budget****. Find out more information by visiting our access to finance packages page.

We provide our customers with a free online quote tool which aims to provide you with a realistic estimate of how much your new boiler installation could cost.

Glow-worm boiler range

The Glow-worm brand manufactures a wide variety of boilers with the aim of catering to all types of homes with different spacing and heating requirements. Here’s a list of some of their popular ranges of boiler systems:


This range covers all of Glow-worm’s boiler types including combi, system and regular boilers and are designed to have exceptional performance capabilities, with key features such as bright LCD displays and easy to use interfaces.


This set of boilers, like the Easicom3 range, includes all boiler types and is designed to provide homeowners with a highly efficient means of heating their home. The range’s advanced features could allow you to reduce your energy usage and thus potentially enable you to make savings on your energy bills**!


This range of Glow-worm combi boilers are designed to provide homeowners with a reliable source of effective heating and instantaneous hot-water without the need for any additional parts or components. These systems could enable you to save space, energy and expenses with their compact design and energy-efficient operations. A boiler from this range could be a suitable option for you if you have a smaller home with lower hot-water demands.


This range includes all boiler types and is designed by Glow-worm to be long-lasting and easy to maintain. These boilers are equipped with an Ultra Quiet operation feature which is designed to prevent them from producing excessive noise.


Which Glow-worm boiler do I need in my home?

Considering the plethora of boiler systems on offer from the Glow-worm brand, it can indeed be a tough task deciding which option is best for your home. Here at HomeServe, we are dedicated to helping you find a boiler that could meet both you and your family’s needs.

When choosing your new Glow-worm boiler, factors you should consider include; your budget, your household’s hot-water and heating demands, as well as the space available in your home. It is also important for you to think about the kW output that your home is likely to require. kW output refers to a boiler’s ability to cope with your heating and hot-water demands and tends to be reliant upon the number of bathrooms and radiators within your home. Thus, if a boiler has a high kW output, it is more likely to be able to deal with a higher demand of hot-water and heating.

HomeServe could provide you with a personalised quote for your new Glow-worm installation, which includes a boiler and kW output recommendation and an estimate of how much the overall installation could cost. Try our quote tool online today, it’s completely free of charge!

Here’s some extra information to help you with your decision. This estimated guide of kW outputs should give you some added insight into the type of Glow-worm combi boiler you could need for your home:

24-27kW 1-2 bedroom, 10 radiators, 1 bathroom
28-34kW 3-4 bedroom, 15 radiators, 1-2 bathroom
35-42kW 4+ bedroom, 20 radiators, 2+ bathroom

(This information has been supplied By Help-Link UK limited and has been produced for information purposes only and should not be used or relied upon as a substitute for professional advice by a suitably qualified engineer.)

Visit our regular and system boiler pages to find out about the kW outputs that could be suitable should you choose to get a different boiler type installed.

Glow-worm Warranty

A warranty could provide you with an added sense of security in knowing that you could be covered should you face issues with your boiler. An effective warranty could safeguard you against a number of boiler problems and could save you money in repair costs. Glow-worm usually provides their customers with standard manufacturer-backed boiler warranties with the option to extend (depending on the boiler model)***.


Glow-worm Service & Repairs

We recommend that you arrange for your boiler to get serviced on an annual basis. This could potentially prolong your boiler’s working life as it allows for any abnormalities to be identified and tackled, thus aiming to prevent the issues from worsening in the future. A yearly service is also often essential to the validation of your boiler warranty***. Here at HomeServe, our expert engineers are more than capable of providing you with a professional boilers service, conducting rigorous tests to help ensure that your boiler is working effectively.

Our team of Gas Safe engineers are also trained to deal with a number of boiler problems, ranging from kettling to leaking or faulty pilot lights. If you’ve discovered that your boiler has a fault, don’t hesitate to contact us, we could arrange for one of our Gas Safe engineers to visit your property and rectify the issue at a time that suits you.


*5% online discount is available to domestic gas and LPG customers who receive an online quote for all boiler brands excluding the Ideal Logic HE24, HE30, HO15 & HO18 and Worcester Bosch 25i ERP, 30i ERP, 15ri & 18ri boilers which qualify for the winter bundles offer. £50 additional discount available on all like-for-like system swaps and a £100 additional discount is available on conventional to combi, and combi to conventional boiler swaps. Online discounted price is only available for the duration of the 14-day quote validity which starts from the day the quote was given. Help-Link UK Ltd include a filter as part of your quote as this is highly recommended by the boiler manufacturer as a key component in maintaining boiler health, functionality and may potentially be looked upon favourably by manufacturers when assessing warranty work. This filter can be removed at the customer's request. Quote also includes a programmable thermostat for all combi boiler installations as this is a legal requirement as part of the Boiler + legislation introduced 6th April 2018, and cannot be removed from the installation unless; it is replaced with an alternative smart thermostat; or another energy saving measure as listed in the Boiler + legislation or if a smart thermostat already exists within the property. Alternative thermostats, including smart thermostats are subject to an additional charge.


*** Subject to an annual service at the customer's expense. Warranty extension from 5-years to 10-years only available on Worcester Bosch and Ideal gas boilers and may be subject to an additional charge.

****24 months Interest Free Credit is only available on Worcester Bosch boilers. Credit is subject to status, affordability assessment and credit checks. Terms & Conditions apply.