Open vent boilers

Whether you're looking for a full open vented central heating system or simply a new open vent gas boiler, Glow-worm has everything you need.

Ultracom hxi

Ultracom hxi

An exceptionally efficient and proven open vent condensing boiler with inbuilt programmer designed to meet the needs of modern lifestyles.

Flexicom hx

Flexicom hx

The Flexicom hx is an open vent system boiler small enough to fit in a kitchen cupboard. And with its direct rear flue option, is ideal for replacements.