Glow-worm Energy7 25R 25kW Heat Only Boiler with Vertical Flue Pack

Product Description

The Glow-worm Energy7 25R 25kW Heat Only Boiler with Vertical Flue Pack is a dependable and efficient heating solution, ideal for homes with traditional systems using a hot water cylinder and cold-water storage tank.

Designed for reliability and long-term performance, this boiler features an automotive-grade aluminium heat exchanger, delivering excellent durability while helping to reduce energy consumption. Its compact cupboard-fit design allows for flexible installation, making it suitable for kitchens or utility spaces.

Supplied as a complete package with vertical flue components, this boiler is ready for installation and compatible with a wide range of Glow-worm controls and accessories. The modern LCD display ensures easy operation, while the high-efficiency Grundfos pump optimises performance and running costs.

Why Customers Should Buy This Product

• Complete package with vertical flue adaptor and terminal included
• 25kW output suitable for small to medium-sized homes
• Compact cupboard-fit design for flexible installation
• Durable aluminium heat exchanger for long-lasting performance
• High-efficiency Grundfos modulating pump reduces energy usage
• Modern LCD display for clear operation and diagnostics
• A-rated efficiency (89.3%) helps lower energy bills
• Compatible with Glow-worm controls and accessories
• Upgradeable warranty up to 10 years with Club Energy and filter
• Reliable performance from Glow-worm

What’s Included

• 1 x Glow-worm Energy7 25R Heat Only Boiler
• 1 x Vertical Flue Adaptor (60/100mm)
• 1 x Vertical Flue Terminal (Black)

Key Specifications

• Brand: Glow-worm
• Range: Energy7
• Product Type: Heat Only Boiler
• Output: 25kW
• Fuel Type: Natural Gas
• ERP Rating: A
• Efficiency: 89.3%
• NOx Class: Class 5
• Mounting Type: Wall Mounted

Dimensions:

• Height: 600 mm
• Width: 370 mm
• Depth: 280 mm

Performance:

• Heat Output: 25 kW
• BTU Output: 90,418 BTU
• CH Condensing Max Output: 26.5 kW
• Noise Level: 52 dB

Flue Options:

• Max Vertical (125mm): 25 m
• Max Vertical (100mm): 10 m
• Max Horizontal (125mm): 25 m
• Max Horizontal (100mm): 10 m

Features:

• Aluminium heat exchanger
• Grundfos ErP modulating pump
• LCD display
• Rear flue option
• Solar compatible
• Compatible with Glow-worm flues and accessories

Warranty:

• Standard: 7 Years
• Extended: Up to 10 Years (with filter and Club Energy registration)

Installation & Compatibility

• Suitable for open vent or sealed systems with hot water cylinder
• Ideal for replacing existing heat-only boilers
• Compatible with Glow-worm flues, controls, and accessories

What’s in the Box

• Heat Only Boiler Unit
• Vertical Flue Components
• Installation Instructions

Important Information

• Heat only boiler – requires separate hot water cylinder and cold water storage tank
• No direct domestic hot water supply