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Glow-worm – great value easy to use boilers for your home

  • Over 80 years pedigree manufacturing heating systems
  • All boilers made in the UK at award-winning Derbyshire factory
  • 7-year guarantee on our Energy boiler range for peace of mind
  • Supported by service team with 250 engineers and UK call centre
  • Installed by a network of independent Glow-worm installers

What does Glow-worm deliver?

Quality & Reliability

Our boilers go through 499 quality checks at the factory to ensure reliability.

Comfort & Quiet

Delivering instant hot water with easy to use controls.

Which Glow-worm boiler works for you and your home?

Glow-worm manufactures highly efficient boilers for all types of home

Combination boilers

Choose our convenient solutions for smaller households to benefit from hot water on demand and a perfectly heated home.

System boilers

These boilers are fitted with a cylinder to provide steady hot water and a comfortable home temperature.

Regular (open vent) boilers

Offering unrivalled comfort with a continuous hot water supply and the perfect temperature in large households.

Having produced reliable heating and energy products for over 80 years, Glow-worm are the pioneers of heating solutions in the UK. Read on to find out more on all of our ground-breaking products and services.


Glow-worm is a foundation of the UK energy industry, having originally begun producing boilers back in 1934 at the Derwent Foundry in Derbyshire.

For the past 80 years, our entire drive has been focussed towards offering you, our customers, reliable and highly efficient products. It’s this drive which has led us right to the top as one of the leading heating manufacturers in the UK.


We pride ourselves in offering exceptional and durable energy solutions, manufacturing all our boilers at our state of the art production facilities in Belper, Derbyshire.

Our revered range of products includes domestic gas boilers, such as combi, system and heat only options.

The Vaillant Group

In 2001 Glow-worm was acquired by the Vaillant Group, Europe’s second-largest heating company.

Vaillant employs over 12,000 people across Europe and China, providing innovative heating, ventilation and air-conditioning technologies to hundreds and thousands of homes all over the world.