Heat Only Boilers

Glow-worm’s exceptional heat-only boilers (also known as ‘open-vent’ or regular boilers) provide central heating and hot water via a winning combination of a boiler, a storage cylinder and water tanks.

As well as providing ultra-efficient system and combi boiler solutions, Glow-worm also specialises in manufacturing award-winning heat-only boilers.

We offer a number of high-efficiency heat-only boilers, specifically designed to be durable and easy to use.

*Note: All extended guarantees stated are only available, when registered by a Club Energy installer.

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Energy regular boiler

ErP A rated compact regular boiler

  • ErP A rated for efficiency - helping you to reduce your energy bills
  • Compact size – perfect in kitchen cupboards
  • Ultra quiet operation

Ultimate₃ regular (open vent) boiler

High efficiency regular boiler from Glow-worm

  • High performance, ErP A rated regular boiler
  • Lightweight boiler with cupboard fit dimensions
  • FREE 5 year guarantee*

Easicom₃ regular boiler

Quality, reliability, choice

  • ErP A rated regular boiler for efficiency – helping to lower your running costs
  • FREE 3 year guarantee with option to extend*
  • Manufactured right here in the UK by Glow-worm, the brand you can trust

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