The Glow-worm Energy 15kW system boiler offers a durable sealed central heating solution designed specifically for residential properties experiencing substantial hot water demands. Operating at a continuous 15.9kW central heating output equating to 54000BTU this appliance integrates seamlessly with a wide range of external hot water storage cylinders. At the core of the chassis lies an automotive-grade aluminium heat exchanger engineered to deliver consistent thermal transfer rates while remaining lightweight and resistant to long-term cyclic stress. The internal hydraulics are driven by a high-efficiency modulating Grundfos pump that intelligently adjusts flow rates to match system resistance thereby minimising electrical consumption and achieving an ErP A rating for heating efficiency.

Designed with spatial efficiency in mind the compact 700x390x280mm white casing is engineered to fit effortlessly within standard kitchen cupboards. Installers benefit from significant routing flexibility as the boiler accommodates both top and rear concentric flue configurations allowing for versatile positioning in restricted environments. Commissioning and user operation are simplified through a modern high-contrast LCD display providing clear diagnostic codes and temperature controls. Furthermore the appliance is fully WRAS approved and incorporates internal thermostatic management to ensure precise climate control across all domestic zones.

Q: Can the flue be routed directly through the wall behind the appliance?
A: Yes the design specifically accommodates a rear flue option to eliminate unsightly visible pipework above the casing.

Q: What type of metal is the primary heat exchanger constructed from?
A: The heat exchanger is fabricated from high-grade automotive aluminium to ensure rapid heat transfer and lower unit weight.

Q: Does the boiler include a built-in circulation pump?
A: It features a factory-fitted modulating Grundfos pump to efficiently manage hydraulic flow throughout the heating circuit.

Q: Is this model suitable for properties with high hot water usage?
A: As a system boiler designed to work alongside an unvented cylinder it easily supports simultaneous multi-bathroom hot water demand.