The Glow-worm Energy 15kW Regular Boiler 10035905 is a high-efficiency gas boiler designed for traditional open vent heating systems. Compact and reliable, it provides efficient central heating performance and is suitable for homes with a separate hot water cylinder and cold water storage tank.
The Glow-worm Energy 15kW System Boiler 10035900 is a compact, high-efficiency gas system boiler designed to provide reliable central heating. Ideal for homes with an unvented hot water cylinder, it delivers efficient heating performance with a modern, space-saving design.