Ultimate2 System Boiler

Exclusive system boiler with 5 years warranty*

  • High performance, ERP A rated system boiler
  • FREE 5 year warranty* with option to extend*
  • £15 reward when registered through Club Energy
  • Available as 25kW model

The Ultimate2 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 Ultimate2 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 Ultimate2 offers proven reliability and performance whilst being light to install and also easy to maintain.

The complete Ultimate2 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 Ultimate2 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

Key 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

• Grundfos modulating 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 accessories available including spacing frame and pipe cover plate

• Plume Management kit compatible

Related Products

Related Products

Climapro₂ RF

  • Two channel wireless programmable room thermostat
  • Backlit display provides advanced user control and functionality
  • Capable of room and weather compensation*
  • Simple to use handheld unit

Introducing MiGo

The personal heating assistant

  • Wi-Fi thermostat and easy-to-use app
  • Manage heating and hot water from anywhere
  • Reduces energy consumption, saves money
  • Internet weather compensation
  • eBUS communication

Climastat The Energy System Boiler

Thermostat from Glow-worm

  • Easy to use
  • Extra low voltage
  • Simple & discreet 2 wire connection
  • Polarity not important

Climapro1 Control

Available wireless and wired

  • Annual service reminder function
  • Automatic update for summer and winter
  • Simple and discreet
  • Weather compensation ability (when used with optional outdoor sensor)



Alternative products

Alternative products

Ultimate2 Combi Boiler

Exclusive combi boiler with 5 years warranty*

  • Leading combi boiler offering great performance
  • FREE 5 year warranty* with option to extend*
  • £15 reward when registered through Club Energy
  • 30kW and 35kW models available

Ultimate2 Regular (open vent) Boiler

Exclusive regular (open vent) boiler with 5 years warranty*

  • High performance, ERP A rated regular boiler
  • £15 reward when registered through Club Energy
  • Lightweight boiler with cupboard fit dimensions
  • FREE 5 year warranty* with option to extend*