Glow-Worm gas boilers prices range between £550 and £1789, excluding the cost of installation.
Glow-worm is amongst the leading boiler manufacturers in the UK and its boilers are highly energy efficient resulting in reduced carbon emissions and heating costs. With a strong British heritage spanning 75 years, Glow-worm also invests in renewable technologies, hot water cylinders and domestic controls. Glow-worm also received the ‘Best Buy’ award from the highly prestigious Which? consumer organisation, which demonstrates the brand’s commitment to quality, performance and value for money.
Glow-Worm Combi Boilers Prices Range – Compact, Neat & Value For Money
Combi boilers generally work by taking cold water straight from the mains supply and heating it as required, which removes the need for separate water storage tanks. Glow-worm combi boilers offer a fantastic level of high-efficiency heating performance, and the Flexicom boilers are the only range of gas boilers in the UK with a direct rear flue option. This means that you can install a Flexicom combi boiler almost anywhere. Extensive flueing options are a feature of all new Glow-worm boilers, allowing for increased flexibility when fitting. Glow-worm combi boiler prices range from £550 to £1,555 and come in various sizes with a range of flow rates and outputs.
We’ve put together a simple table that enables you to compare each Glow-worm combi boiler series:
COMBI GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
Glow-worm Betacom4 Combi | 24 – 30kW | Small to medium-sized homes with one bathroom | £550 – £612 |
Glow-worm Essential Combi | 24 – 28kW | Small to medium-sized homes with one bathroom | £620 – £660 |
Glow-worm Easicom Combi | 24 – 28kW | Small to medium-sized homes with one bathroom | £627 – £660 |
Glow-worm Betacom2 Combi | 24 – 28kW | Small to medium-sized homes with one bathroom | £642.41 – £680.06 |
Glow-worm Flexicom Combi | 24 – 35kW | Small, medium and large-sized homes | £650 – £880 |
Glow-worm Ultimate3 Combi | 30 – 35kW | Medium to large-sized homes with one bathroom | £695 – £770 |
Glow-worm Ultracom2 Combi | 24 – 35kW | Small, medium and large-sized homes | £738 – £975 |
Glow-worm Energy Combi | 25 – 35kW | Small, medium and large-sized homes | £790 – £920 |
Glow-worm Energy 35 Store Combi | 35kW | Large homes with more than one bathroom | £1,555 |
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Glow-Worm Regular Heat Only Boilers Prices Range – Traditional & Practical
Regular heat only boilers (often referred to as conventional or open vented boilers) tend to be used in more traditional central heating systems and are ideal replacements if this type of system is already installed in your home. Working on the basis of ‘heating only’, a heat only boiler requires additional storage tanks for hot and cold water. Unlike the combi boiler system, hot water flow rates tend to be higher as hot water is already stored in the hot water cylinder. This enables multiple taps to be used at the same time but it takes up more space than modern systems. Glow-worm regular heat only boilers range from £623 to £1,004 with varying outputs (depending on the size of the property).
Suitable for different lifestyle and properties, the Glow-worm regular heat only boiler range includes the following options:
HEAT ONLY GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
Glow-worm Flexicom hx Regular | 24 – 35kW | Small, medium and large-sized homes with more than one bathroom | £622.80 – £1,003.64 |
Glow-worm Energy Regular | 12 – 30kW | Small, medium and large-sized homes with more than one bathroom | £780 – £900 |
Glow-worm Ultimate3 Regular | 25kW | Small and medium-sized homes with more than one bathroom | £830 |
Glow-worm Easicom3 Regular | 25kW | Small and medium-sized homes with more than one bathroom | £890 |
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Glow-Worm System Boilers Prices Range – Reliable, Neat & Quick To Install
System boilers are similar to regular heat only boilers in the sense that they require an additional hot water storage tank, however, they feed directly into the mains water supply and are completely sealed. With Glow-worm system boilers, all components are pre-wired, pre-plumbed and pre-tested for greater reliability as well as a quicker and more convenient installation. Glow-worm system boilers are highly efficient and come in a range of sizes with varying flow rates and outputs. Prices range from £625 to £1,789.
Designed with most property sizes in mind, the Glow-worm system boiler range includes:
SYSTEM GAS BOILER SERIES | SIZES | SIZE OF HOME | PRICE |
Glow-worm Easicom3 System | 25kW | Small and medium-sized homes with multiple bathrooms | £625 |
Glow-worm Energy System | 12 – 30kW | Small, medium and large-sized homes with multiple bathrooms | £710 – £840 |
Glow-worm Ultracom2 sxi System | 12 – 30kW | Small, medium and large-sized homes with multiple bathrooms | £716.84 – £857.24 |
Glow-worm Flexicom System | 18 – 30kW | Small, medium and large-sized homes with multiple bathrooms | £615.60 – £703.20 |
Glow-worm Ultimate3 System | 25kW | Small and medium-sized homes with multiple bathrooms | £810 |
Ultrapower sxi Store System | 10 – 17kW | Small and medium-sized homes with multiple bathrooms | £1,635.41 – £1,788.78 |
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Why Choose Glow-Worm?
Glow-worm has been manufacturing user-friendly boilers for UK homeowners since 1934, so the brand has been on the scene for a very long time. These days, Glow-worm is dedicated to offering customers dependable and high-efficiency products that are built at state-of-the-art production facilities in Derbyshire. As a leading boiler manufacturer and one of the first to produce a condensing boiler, it came as no shock when the brand was acquired by the incredibly popular Vaillant Group in 2001. But what do customer and engineer reviews say? To help you choose the most reliable brand of boiler, we’re going to take a look at what the nation has said about Glow-worm.
Great Customer Reviews
Over 1,500 customer reviews can be found on Trustpilot, one of the world’s most popular review platforms. Glow-worm has achieved 4 out of 5 stars overall, with 74% of reviewers rating the brand and its boilers as excellent. This is a pretty good score and should leave you feeling confident about the quality and reliability of Glow-worm boilers. Negative feedback is very low, with only 4% of people leaving a bad or average review and just 2% rating their experience as poor. Having taken a closer look at the feedback from verified orders, it seems as though most people are more than satisfied with their products and the brand’s level of service.
Average Which? Score
After reading mostly positive reviews on Trustpilot, we’re surprised to learn that Glow-worm has an overall Which? score of 54%. This means that the brand hasn’t scored as high as some others, such as Viessmann and Worcester Bosch. Glow-worm achieved 3 out of 5 stars for every category except for the availability of spares and parts, which they were awarded 4 stars. Although the scores could be better, Glow-worm does offer affordable mid-range boilers that come with extended warranty options.
Below, you can find the brand data results for Glow-worm boilers, which we sourced from the Which? website.
Overal Score |
54% |
Reliabiliy | ⭐️⭐️⭐️ |
Customer Score | ⭐️⭐️⭐️ |
Engineer Recommendation | ⭐️⭐️⭐️ |
Build Quality | ⭐️⭐️⭐️ |
Availability of Parts and Spares | ⭐️⭐️⭐️⭐️ |
Ease of fixing a fault | ⭐️⭐️⭐️ |
Ease of Servicing | ⭐️⭐️⭐️ |
Based on responses from a May 2018 survey of 11,571 Which? members about their boilers.
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Model | Type | Dimensions | Maximum Flow Rate | Output | Efficiency Rating | Typical Price |
---|---|---|---|---|---|---|
Betacom4 Combi-24 | Combi | H - 740 mm W - 418 mm D - 300 mm | 10 l/min | 24 kW | A | £550 |
Betacom4 Combi 30 | Combi | H - 740 mm W - 418 mm D - 300 mm | 12.4 l/min | 30 kW | A | £612 |
Flexicom 18sx | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 18 kW | A | £615.6 |
Essential Combi 24 | Combi | H - 740 mm W - 418 mm D - 300 mm | 10 l/min | 24 kW | A | £620 |
Flexicom 24hx | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 24 kW | A | £622.8 |
Easicom 24 | Combi | H - 740 mm W - 480 mm D - 338 mm | 9.8 l/min | 24 kW | B | £624 |
Easicom3 System 25 | System | H - 740 mm W - 418 mm D - 300 mm | N/A | 25 kW | A | £625 |
Betacom2 24 | Combi | H - 900 mm W - 500 mm D - 390 mm | 9.8 l/min | 24 kW | A | £642.41 |
Ultracom 12hxi | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 12 kW | A | £649.1 |
Flexicom 24cx | Combi | H - 700 mm W - 390 mm D - 280 mm | 9.85 l/min | 24 kW | A | £650 |
Easicom 28 | Combi | H - 740 mm W - 480 mm D - 338 mm | 11.5 l/min | 28 kW | B | £660 |
Essential Combi 28 | Combi | H - 740 mm W - 418 mm D - 300 mm | 11.7 l/min | 28 kW | A | £660 |
Betacom2 28 | Combi | H - 900 mm W - 500 mm D - 390 mm | 11.2 l/min | 28 kW | A | £680.06 |
Ultracom 15hxi | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 15 kW | A | £687.48 |
Ultimate3 Combi 30 | Combi | H - 740 mm W - 418 mm D - 300 mm | 12.4 l/min | 30 kW | A | £695 |
Flexicom 30cx | Combi | H - 700 mm W - 390 mm D - 280 mm | 12.3 l/min | 30 kW | A | £696 |
Flexicom 30sx | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 30 kW | A | £703.2 |
Energy System 12 | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 12 kW | A | £710 |
Ultracom 18hxi | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 18 kW | A | £716.78 |
Ultracom2 12sxi | System | H - 726 mm W - 450 mm D - 334 mm | N/A | 12 kW | A | £716.84 |
Flexicom 30hx | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 30 kW | A | £719.84 |
Ultracom2 24cxi | Combi | H - 726 mm W - 418 mm D - 346 mm | 10.4 l/min | 24 kW | A | £738 |
Energy System 15 | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 15 kW | A | £740 |
Ultracom 24hxi | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 24 kW | A | £745.82 |
Ultimate 30c | Combi | H - 740 mm W - 418 mm D - 338 mm | 12.5 l/min | 30 kW | B | £750 |
Energy System 18 | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 18 kW | A | £770 |
Ultimate3 Combi 35 | Combi | H - 740 mm W - 418 mm D - 300 mm | 14.4 l/min | 35 kW | A | £770 |
Energy Regular 12 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 12 kW | A | £780 |
Ultracom2 18sxi | System | H - 726 mm W - 450 mm D - 334 mm | N/A | 18 kW | A | £788.84 |
Energy Combi 25 | Combi | H - 700 mm W - 390 mm D - 280 mm | 12.1 l/min | 25 kW | A | £790 |
Ultracom 30hxi | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 30 kW | A | £795.36 |
Ultimate 35c | Combi | H - 740 mm W - 418 mm D - 338 mm | 14.6 l/min | 35 kW | B | £800 |
Energy Regular 15 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 15 kW | A | £810 |
Energy System 25 | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 25 kW | A | £810 |
Ultimate3 System 25 | System | H - 740 mm W - 418 mm D - 300 mm | N/A | 25 kW | A | £810 |
Ultimate3 Regular 25 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 25 kW | A | £830 |
Energy Regular 18 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 18 kW | A | £840 |
Energy System 30 | System | H - 700 mm W - 390 mm D - 280 mm | N/A | 30 kW | A | £840 |
Energy Combi 30 | Combi | H - 700 mm W - 390 mm D - 280 mm | 14.2 l/min | 30 kW | A | £850 |
Ultracom2 30sxi | System | H - 726 mm W - 450 mm D - 334 mm | N/A | 30 kW | A | £857.24 |
Energy Regular 25 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 25 kW | A | £870 |
Ultracom2 30cxi | Combi | H - 726 mm W - 418 mm D - 346 mm | 12.5 l/min | 30 kW | A | £874.7 |
Flexicom 35cx | Combi | H - 700 mm W - 390 mm D - 280 mm | 14.4 l/min | 35 kW | A | £880 |
Easicom3 Regular 25 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 25 kW | A | £890 |
Energy Regular 30 | Regular | H - 600 mm W - 375 mm D - 280 mm | N/A | 30 kW | A | £900 |
Energy Combi 35 | Combi | H - 700 mm W - 390 mm D - 280 mm | 16.5 l/min | 35 kW | A | £920 |
Ultracom2 35cxi | Combi | H - 726 mm W - 418 mm D - 346 mm | 14.6 l/min | 35 kW | A | £975 |
Flexicom 35hx | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 35 kW | A | £1003.64 |
Ultracom 38hxi | Heat Only | H - 600 mm W - 375 mm D - 280 mm | N/A | 38 kW | A | £1213.06 |
Ultracom2 35 store | Combi | H - 890 mm W - 470 mm D - 561 mm | 19.1 l/min | 35 kW | A | £1309.2 |
Energy 35 Store Combi 35 | Combi | H - 890 mm W - 470 mm D - 561 mm | 19.7 l/min | 35 kW | A | £1555 |
Ultrapower 100sxi Store | System | H - 1260 mm W - 575 mm D - 600 mm | 12.5 l/min | 10 kW | A | £1635.41 |
Ultrapower 170sxi Store | System | H - 1520 mm W - 575 mm D - 600 mm | 12.5 l/min | 17 kW | A | £1788.78 |
As for getting the best competitive boiler installation price and service, you will need to shop around. We recommend getting a quote from a national installer and a local boiler installer. Compare them on the cost of the boiler and the cost of installation. Average installation costs are between £1,500 – £1,800. Comparing Glow Worm gas boilers prices could save you hundreds of pounds.
Other factors to consider include flexibility of when your installer can install your new boiler and their safety record. Today all boiler installations are done by Gas Safe Registered engineers. This ensures it’s done safely and legally.