The Easicom 3 25kW is supplied with a standard 60/100mm horizontal flue kit, making it a practical choice for standard installations. It is compatible with the Glow-worm HydraCyl cylinder range and Glow-worm controls, including MiPro Sense, MiSet, MiGo Select, Climastat Select and the MiGo Link internet gateway.
25kW System Boiler
ErP A Rated
Natural Gas
5 Year Warranty
Built-In Pump
8L Expansion Vessel
Heating Output
25 kW maximum
Efficiency
94% ErP seasonal efficiency
Modulation
1:5 modulation ratio
Dimensions
740 × 418 × 300 mm
System Boiler Advantages
A system boiler works with a separate hot water cylinder, making this type of heating system suitable for properties requiring hot water storage and simultaneous demand from multiple bathrooms and showers. Unlike a conventional open-vent system, the Easicom 3 incorporates key system components within the boiler.
The Easicom 3 features a built-in pump and 8-litre expansion vessel, together with integrated safety devices. It does not require a cold water storage tank in the loft, providing a cleaner system arrangement and helping simplify installation.
Integrated Components
Built-in pump, expansion vessel and safety components.
Cylinder Compatible
Designed to work with a separate hot water cylinder.
No Loft Tank
No cold water storage cistern is required.
Multi-Bathroom Use
Suitable for systems using a separate hot water cylinder.
Key Specifications
| G.C. Number |
41-019-49 |
| Manufacturer Part No. |
0010020902 |
| Boiler Type |
System |
| Heat Exchanger |
Aluminium |
| Maximum Heat Output |
25 kW (6.0–25.2 kW at 80/60°C) |
| CH Output Range |
6.3–26.5 kW at 50/30°C |
| Seasonal Efficiency |
94% ErP — A Rated | SAP 89.7% |
| Modulation Factor |
1:5 |
| NOx |
39 mg/kWh — Class 5 |
| Sound Power |
51 dB(A) |
| Fuel |
Natural Gas G20 |
| Expansion Vessel |
8 litres (built-in) |
| Pump |
Built-in |
| Flue Outlet |
Top only |
| Flue Diameter |
60/100mm concentric | 80/125mm available |
| Flue System Types |
C13 horizontal, C33 vertical, C53 twin pipe |
| Maximum Flue Length 60/100mm |
9m horizontal / 10m vertical |
| Maximum Flue Length 80/125mm |
25m |
| Rear Flue |
No |
| Dimensions (H × W × D) |
740 × 418 × 300 mm |
| Weight |
32 kg |
| Clearances |
Top 205mm | Sides 5mm | Bottom 150mm | Front 600mm |
| IP Rating |
IPX4D — Zone 2 bathroom installation permitted |
| Electrical Supply |
230V / 50Hz |
| Warranty |
5 Years via myREWARDS registration |
| Made In |
Belper, Derbyshire, UK |
| What's Included |
Boiler + standard horizontal flue kit |
Efficiency & Heating Performance
The Glow-worm Easicom 3 25kW system boiler features an aluminium heat exchanger and achieves 94% seasonal efficiency with an ErP A rating. Its PCDB SAP rating is 89.7%, while the 1:5 modulation ratio allows the burner to turn down to as low as 6.3kW.
ErP A Rated
94% seasonal efficiency rating for central heating.
1:5 Modulation
Burner output can reduce to as low as 6.3kW.
Low NOx
39 mg/kWh and NOx Class 5 specification.
51 dB(A)
Specified sound power level.
Installation & Compatibility
Top-exit flue only: The Easicom 3 does not have a rear flue option. The standard horizontal 60/100mm flue kit is included. Maximum flue lengths are 9m horizontal or 10m vertical using 60/100mm, with up to 25m available using the 80/125mm large-bore system.
The boiler is compatible with Glow-worm concentric flue systems including C13 horizontal, C33 vertical and C53 twin-pipe configurations. The Easicom 3 can also be paired with the Glow-worm HydraCyl range and compatible Glow-worm heating controls.
Compatible Cylinders & Controls
HydraCyl Range
Compatible with 150, 175, 210 and 250 litre Glow-worm HydraCyl cylinders.
MiPro Sense
Compatible with the Glow-worm MiPro Sense control ecosystem.
MiSet & MiGo Select
Supports Glow-worm MiSet and MiGo Select controls.
MiGo Link
Compatible with the MiGo Link internet gateway for remote monitoring via the MiGo Xpert installer app.
Warranty & Manufacturer Support
The Easicom 3 comes with a 5-year warranty when registered through Glow-worm myREWARDS within one month of installation. Installers can also earn myREWARDS points from registrations, redeemable against tools, technology and training.
5-Year Warranty
Available through myREWARDS registration within one month of installation.
Spare Parts
Spare parts are available for up to 15 years after production ends.
Nationwide Stockists
Over 500 locations are stated as nationwide stockists.
Ideal For
System Boiler Installations
Suitable for central heating systems using a separate hot water cylinder.
Cylinder-Based Hot Water
Pairs with the Glow-worm HydraCyl range in 150–250 litre capacities.
Space-Conscious Installations
Compact 740 × 418 × 300mm boiler dimensions.
Installer-Focused Projects
Built-in system components and included horizontal flue kit help simplify standard installations.
The Glow-worm Easicom 3 25kW System Boiler combines ErP A-rated efficiency, a 1:5 modulation ratio, integrated system components and compatibility with Glow-worm cylinders and controls. Supplied with a standard horizontal flue kit, it provides a compact system boiler solution for installations requiring a separate hot water cylinder.
