Ultimate2 System Boiler

High efficiency sealed system boiler from Glow-worm

  • Highly reliable system boiler offering outstanding performance
  • A rated for efficiency – helping you to save money on your fuel bills
  • FREE 5 year parts and labour warranty*
  • Extended warranty options available*
  • Available in a 25kW model

*When registered through Club Energy

The Ultimate2 System boiler provides outstanding heating performance in a 25kW model, and is suitable for homes with high hot water demands, when combined with a hot water storage cylinder.

Built with an automotive grade aluminium heat exchanger, the Ultimate2 is designed to offer high performance, whilst its Grundfos modulating pump reduces energy usage, meaning the boiler is A rated when it comes to efficiency.

The boiler features a modern, bright LCD display with an easy to use interface, and is also compatible with Glow-worm’s popular Migo app based control (sold separately) – meaning you can control your heating and hot water from anywhere/anytime simply using your mobile phone or tablet.

The Ultimate2 also comes ready with a 5 year parts and labour guarantee when your Gas Safe Registered installer registers the installation on the Glow-worm Club Energy installer loyalty programme.

Key Features & Benefits

• Superior performance system boiler available in a 25kW model

• 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

• Inbuilt filling loop for straightforward maintenance

• 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*

• Wide range of flue options available

• Wide range of Glow-worm accessories available should your property require them

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

High efficiency combi boiler from Glow-worm

  • Leading combi boiler offering outstanding performance
  • A rated for efficiency – helping you to reduce your fuel bills
  • FREE 5 year parts and labour warranty*
  • Extended warranty options available
  • Available in 30kW and 35kW models to suit homes of all sizes

Ultimate2 Regular (open vent) Boiler

High efficiency regular boiler from Glow-worm

  • 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*