Glow-worm Energy 25R 25kW Heat Only Boiler with Horizontal Flue Pack

Product Description

The Glow-worm Energy 25R 25kW Heat Only Boiler with Horizontal Flue Pack is a high-performance and efficient heating solution, ideal for homes with traditional systems and stored hot water cylinders.

Designed with a compact, cupboard-fit form, this boiler offers flexibility for installation in kitchens or utility spaces. Its automotive-grade aluminium heat exchanger delivers enhanced durability and efficiency, helping to reduce energy consumption while ensuring long-term reliability.

Supplied with a horizontal flue, this package provides a convenient, ready-to-install solution. The integrated Grundfos ErP modulating pump and modern LCD display further enhance efficiency and ease of use, making it a smart choice for both new installations and replacements.

Why Customers Should Buy This Product

• Complete package with horizontal flue included
• 25kW output suitable for medium-sized homes
• Compact cupboard-fit design for flexible installation
• Automotive-grade aluminium heat exchanger for durability and efficiency
• Grundfos high-efficiency modulating pump reduces energy usage
• Modern LCD display for easy control and monitoring
• Super quiet operation for improved comfort
• A-rated efficiency to help lower energy bills
• Upgradeable warranty up to 10 years with Club Energy and filter
• Trusted performance from Glow-worm

What’s Included

• 1 x Glow-worm Energy 25R Heat Only Boiler
• 1 x Glow-worm Horizontal Flue Kit

Key Specifications

• Brand: Glow-worm
• Range: Energy
• Product Type: Heat Only Boiler
• Output: 25kW
• Fuel Type: Natural Gas
• ERP Rating: A
• 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: 51 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 heating systems with a hot water cylinder
• Ideal for replacing existing heat-only boilers
• Compatible with Glow-worm controls and accessories

What’s in the Box

• Heat Only Boiler Unit
• Horizontal Flue Kit
• Installation Instructions

Important Information

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