Heat Only Boilers

The Glow-worm Energy 18kW Heat is a high-efficiency condensing heat only boiler for medium-sized homes with up to 12 radiators, requiring a hot water cylinder and feed/expansion tank. With a 94% efficiency rating (ErP A-rated), it’s ideal for traditional systems or high hot water demand households. Its compact design (700x390x280mm, 24kg) supports cupboard installation. Quiet Mark approved, it features an aluminium heat exchanger, a bright LCD display, and MiGo app compatibility. It supports natural gas or LPG and offers a 7-year parts and labour warranty, extendable to 10 years with a Club Energy installer.

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