Glow-worm

Glow-worm has been designing and manufacturing boilers for over 80 years and they are known to be reliable, affordable and easy to install.

Their entire range of boilers run on natural gas, with the option to choose between combi, regular and system models.

Depending on the boiler type that you purchase, you will receive a standard warranty of at least 3 years; however, for some models this can be extended up to 15 years if it is fitted by an installer registered with Glow-worm’s Club Energy loyalty scheme.

Glow-worm combi boilers

Combi boilers are an increasingly popular choice for homeowners. Not only are they compact - many are small enough to be fitted inside a kitchen cabinet - but they also don’t require an additional cold water storage tank or hot water cylinder to be fitted.

Combi boilers connect to the main water supply and only produce hot water when you need it - either when turning on a tap or turning on your central heating. This means combi boilers can often be more energy efficient than other boiler types and cheaper to run.

Boiler model kW Output Efficiency Warranty Price
Glow-worm Betacom₄ 24kW Combi Gas Boiler 21.2kW 94% 5 years £525
Glow-worm Betacom₄ 30kW Combi Gas Boiler 30kW 94% 5 years £565
Glow-worm Easicom₃ 24kW Combi Gas Boiler 24kW 94% 3 years £614
Glow-worm Easicom₃ 28kW Combi Gas Boiler 28kW 94%  3 years  £665 
Glow-worm Ultimate₃ 30kw Combi Gas Boiler 30kW 94% 5 years £705
Glow-worm Ultimate₃ 35kw Combi Gas Boiler 35kW 94% 5 years £775
Glow-worm Energy Combi 25kW Gas Boiler 25kW 93% 7 years £775
Glow-worm Energy Combi 30kW Gas Boiler 30kW 93% 7 years £795 
Glow-worm Energy Combi 35kW Gas Boiler 35kW 93% 7 years £915
Glow-worm Essential 24kW Combi Gas Boiler 24kW 89.3% 3 years £1,853
Glow-worm Essential 28kW Combi Gas Boiler 28kW 89.3% 3 years £1,234
Glow-worm Energy 35 Store 35kW Combi Gas Boiler 335kW 89.4£ 7 years  £1,580 

Glow-worm regular boilers

If you have a large household or have a high demand for water, you may want to consider a Glow-worm regular boiler. Regular boilers use a cold water storage tank and a hot water cylinder, which provides a steady supply of water if you need to run multiple taps, showers or baths at the same time.

Glow-worm’s regular boilers can be wall-mounted and come in a range of outputs to suit any type or size of property.

Boiler model kW Output Efficiency Warranty Price
Glow-worm Energy Regular 12kW Gas Boiler 12kW 89.3% 7 years £713
Glow-worm Energy Regular 15kW Gas Boiler 15kW 89.3% 7 years £780
Glow-worm Energy Regular 18kW Gas Boiler 18kW 89.3% 7 years £850
Glow-worm Energy Regular 25kW Gas Boiler 25kW 89.2% 7 years  £790
Glow-worm Energy Regular 30kW Gas Boiler 30kW 89.2%  7 years  £890
Glow-worm Easicom₃ 25kW Regular Gas Boiler 25kW 94% 3 years £685
Glow-worm Ultimate₃ 25kW Regular Gas Boiler 25kW 89.6% 5 years £725

Glow-worm system boilers

System boilers are ideal for households that have a high demand for water but don’t have sufficient space to install a cold water storage tank in the loft. Like regular boilers, you still need a cylinder to store hot water, but the boiler connects to the mains water supply - meaning it can heat the central heating directly.

Glow-worm’s system boilers are compact and come in a range of outputs to suit properties of varying sizes. They all feature a bright LCD display and have an easy-to-use system that you can quickly get to grips with.

They have a high energy efficiency rating and are quiet when they are in operation.

Boiler model kW Output Efficiency Warranty Price
Glow-worm Energy System 12kW Gas Boiler 12kW 89.3% 7 years £700
Glow-worm Energy System 15kW Gas Boiler 15kW 89.3% 7 years £725
Glow-worm Energy System 18kW Gas Boiler 18kW 89.3%  7 years  £765 
Glow-worm Energy System 25kW Gas Boiler 25kW 89.3%  7 years  £785 
Glow-worm Energy System 30kW Gas Boiler 30kW 89.3%  7 years  £850 
Glow-worm Easicom₃ 25s System Gas Boiler 25kW 89.7% 3 years £595
Glow-worm Ultimate₃ 25kW System Gas Boiler 25kW 89.7%  5 years  £725 
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