The Glow-worm Energy Combi Boiler 25kW is a compact natural gas combination boiler designed to provide reliable central heating and domestic hot water from a single wall-mounted appliance. With a 25 kW central heating output and a 10.4 litres per minute hot-water flow rate, it is a popular option for smaller properties such as flats, apartments and homes with 1–2 bedrooms and 1 bathroom.
The boiler features an A-rated energy efficiency class with 94% ErP efficiency, a compact cupboard-fit design, LCD display, aluminium heat exchanger and Grundfos modulating pump. This package also includes a horizontal flue and magnetic filter, providing key components for the installation.
Glow-worm Energy
25kW Combi Boiler
Natural Gas
A Rated
7-Year Guarantee
Flue & Filter Included
Central Heating Output
25 kW
Hot-Water Flow
10.4 L/min
Applications & suitability
Smaller Properties
Suitable for smaller domestic properties requiring central heating and hot water from one appliance.
Flats & Apartments
A compact combi boiler option for flats and apartments with suitable natural gas supplies.
1–2 Bedroom Homes
Designed around the requirements of smaller homes with 1–2 bedrooms and 1 bathroom.
Cupboard Fit
The compact format supports cupboard-fit installation where the installation requirements allow.
Key specifications
| Product |
Glow-worm Energy Combi Boiler 25kW with Flue & Filter |
| Brand |
Glow-worm |
| Range |
Energy |
| Boiler Type |
Combi |
| Central Heating Output |
25 kW |
| Hot-Water Flow Rate |
10.4 L/min |
| Fuel Type |
Natural Gas |
| Energy Efficiency Class |
A |
| ErP Efficiency |
94% |
| Noise Level |
49 dB(A) |
| NOx Class |
Manufacturer data |
| Flue |
Horizontal flue |
| Flue Length |
Listed |
| Colour |
White |
| Mounting Type |
Wall-mounted |
| Dimensions |
700 mm (H) × 390 mm (W) × 280 mm (D) |
| Finish |
Smooth, contemporary design |
| Modes |
Heating and hot water |
| Power Source |
Natural Gas |
| Manufacturer Stock Code |
0010040024 |
| EAN Code |
5037985126024 |
| Warranty |
7 Years |
| Application |
Domestic |
| Ready for 20% Hydrogen |
No |
| Magnetic Filter |
Included |
Installation & compatibility
The Glow-worm Energy 25kW Combi Boiler is a wall-mounted natural gas appliance designed for domestic heating and hot-water applications. The package includes a horizontal flue and magnetic filter. Installation must be carried out by a qualified professional in accordance with applicable safety requirements and installation guidance. Check the appliance, flue arrangement and installation requirements for compatibility before fitting.
Design & performance benefits
25kW Heating Output
Provides a 25 kW central heating output for the intended domestic application.
10.4 L/min Hot Water
Delivers a stated hot-water flow rate of 10.4 litres per minute.
94% ErP Efficiency
Features a stated ErP efficiency of 94% and an A-rated energy efficiency class.
Compact Boiler Design
The 700 × 390 × 280 mm format and cupboard-fit design are suited to compact domestic installations where appropriate.
Additional installation features
Horizontal Flue
Supplied with a horizontal flue as part of the stated package.
Magnetic Filter
Includes a magnetic filter within the package.
LCD Display & Modulating Pump
Features an LCD display and Grundfos modulating pump as specified.
Ideal for
Flats
A compact 25kW combi boiler option for suitable flat installations.
Apartments
Designed for domestic apartment applications requiring heating and hot water.
1–2 Bedroom Homes
A suitable option for the smaller 1–2 bedroom properties specified.
1 Bathroom Homes
The stated 10.4 L/min hot-water flow rate is suited to the specified smaller domestic application.
The Glow-worm Energy 25kW Combi Boiler combines a 25 kW central heating output with a 10.4 L/min hot-water flow rate in a compact wall-mounted design. With 94% ErP efficiency, an A energy rating, LCD display, aluminium heat exchanger, Grundfos modulating pump, horizontal flue and magnetic filter, it is specified for smaller domestic properties including flats, apartments and 1–2 bedroom homes with 1 bathroom. The boiler is supplied with a 7-year warranty.
At GetPlumb, we strive to provide reliable and cost-effective delivery options to our customers. Please review our shipping policy below.
🆓 Free Local Delivery (Orders £100 & above)
We offer FREE delivery on orders £100 or more
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For orders that do not qualify for free delivery, standard
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Customers can also choose to collect their order from our store in
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