Ultimate₃ system boiler

High efficiency sealed system boiler from Glow-worm

Highly reliable system boiler offering outstanding performance
ErP A rated for efficiency – helping you to save money on your energy bills
FREE 5 year parts and labour guarantee*
Available in a 25kW model

Find your local Glow-worm Club Energy Installer

The Ultimate₃ 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).

General information

Built with an automotive grade, aluminium, heat exchanger, the Ultimate₃ is designed to offer high performance. 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 at anytime by simply using your mobile phone or tablet.

The Ultimate₃ also comes prepared with a free 5 year parts and labour guarantee when your Gas Safe registered installer registers the installation on the Glow-worm Club Energy installer loyalty programme.

Features & benefits

Superior performance system boiler available in a 25kW model
Modern, bright, LCD display with an easy-to-use interface
High quality, automotive grade, aluminium heat exchanger providing excellent performance
ErP A rated for efficiency - helping you to reduce your 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
Free 5 years parts and labour guarantee*
Wide range of flue options available
Wide range of Glow-worm accessories available

*with option to extend when registered through Club Energy

Specifications

Ultimate₃ system boiler	25kW
Boiler dimensions (H x W x D mm)	740 x 418 x 300
Maximum horizontal flue length 60/100 (m)	10
Maximum vertical flue length 60/100(m)	10
PCDB seasonal efficiency (%)	89.7
ErP rating	A

Downloads

Brochures

Ultimate₃ brochure

Size: 2.88 MB

Operation instructions

Ultimate₃ system operating instructions

Device Type: 25S

Size: 901.23 KB

Leaflet

Ultimate range leaflet

Size: 927.50 KB

How to get

Want to find out more?

Find your local Glow-worm Club Energy Installer

Club Energy is Glow-worm’s installer loyalty scheme. By choosing a Glow-worm Club Energy Partner, you’re choosing our network of fully trained, independent installers who can offer you exclusive extended Guarantees, as well as a free no obligation quote to ensure your Glow-worm boiler is the perfect fit for you and your home.

Find your local Glow-worm Club Energy Installer