Ultimate₃ system boiler

Exclusive system boiler with 5 years warranty*

ErP A rated for efficiency - helping to reduce energy bills
FREE 5 year warranty with option to extend*
£15 reward when registered through Club Energy
Available as 25kW model

The Ultimate₃ is Glow-worm’s high performance, ErP A rated boiler range developed for the one off installer market, and exclusively manufactured for City Plumbing Supplies.

The Ultimate₃ sealed system boiler provides a reliable and efficient heating solution for homes with a high hot water demand, and is available as a 25kW model. The high performance model features a Grundfos modulating pump for reduced energy consumption, a manual pressure gauge for easy installation, flexible flue options for easy siting, and a modern, bright, LCD display with a simple-to-use interface.

Designed using an automotive grade aluminium heat exchanger, the Ultimate₃ offers proven reliability and performance whilst being light to install and easy to maintain.

The complete Ultimate₃ range (including combi, system and regular/open vent options) is compatible with the full range of Glow-worm controls including the popular MiGo app based control.

The Ultimate₃ offers installers a £15 reward and comes with a free 5 year warranty when registered through Club Energy; where installers can also benefit from business tools including the Plumbing Toolbox app, Gas Safe Notifications, Benchmark and some great rewards.

*When registered through Club Energy

Features & benefits

Sealed system boiler range available in a 25kW output
Modern, bright, LCD display with easy-to-use interface
High quality, automotive grade, aluminium heat exchanger providing excellent performance
High efficiency, A rated boiler for ErP energy labelling to reduce energy bills
Modulating Grundfos pump for reduced energy use
Manual pressure gauge to make installation easy
Uses familiar Glow-worm diagnostics for easy install & servicing
Inbuilt filling loop
Compatible with full range of Glow-worm controls, flues and accessories
Ideal for use with innovative MiGo app based control
5 years parts and labour guarantee with option to extend*
Telescopic flue option available
ø60/100 and ø80/125 flue options available
Wide range of Glow-worm accessories available including spacing frame and pipe cover plate
Plume Management kit compatible

*When registered through Club Energy

Specifications

Ultimate₃ system boiler	25kW
Casing dimensions (H x W x D mm)	740 x 418 x 300
Weight (lift) (kg)	32
Performance
CH output minimum/maximum (kW)	6.1/25.5
SEDBUK rating 2009 (%)	89.3
NOx class (natural gas)	5
LPG compatible	No
ErP rating	A
Construction
Heat exchanger material	Aluminium
Burner type	Pre-mixed
Fully modulating	Yes
DHW plate heat exchanger	Yes
Integrated hydrobloc	Yes
Installation
Suitable for sealed systems	Yes
Inbuilt filling loop	Integrated
Inbuilt condensate trap/siphon	Yes
Inbuilt boiler frost protection	2 Stage
Zero compartment ventilation	Yes
Pump	Grundfos
Clearances
Top (from top of boiler mm)	300
Side (mm)	0*
Bottom (mm)	300
Front (mm²)	600**
User interface
User display	Super bright LCD
Diagnostics	Advanced
User adjustable CH temperature control	Yes
Pipes
Water connections (mm)	2 x 22/2 x 15
Flues
Maximum horizontal Ø60/100 (m)	9
Maximum vertical Ø60/100 (m)	9
Maximum horizontal Ø80/125 (m)	25
Maximum vertical Ø80/125 (m)	25
Optional plume management kit Ø60/100	Yes
Optional spacing frame	Yes