Skip to product information
1 of 2


Glow-worm Ultimate2 25S 25kW System Boiler 10016126

Regular price £1,116.00 GBP
Regular price £982.08 GBP Sale price £1,116.00 GBP
Sale Sold out
Tax included. Shipping calculated at checkout.
The Ultimate2 is Glow-worm’s high performance ErP A rated boiler, which is suitable for buildings with a high demand for hot water and heating. Designed using automotive grade aluminium thehigh quality Ultimate2 heat exchanger provides the highest possible performance with proven reliability. This model is fitted with a Grundfos pump to help improve the efficiency of hot water system, lowering the amount of energy needed, resulting in lower heating bills compared to older systems. The Ulitmate 2 also offers a number of flue options for flexibility of siting, while the boiler itself is light and easy to install. A modern bright LCD display makes it easy to change and confirm settings, while familiar Glow-worm diagnostics help with a simple set up and servicing.

  • The Ultimate2 is Glow-worm’s high performance ErP A rated boiler. Designed using automotive grade aluminium the Ultimate2 heat exchanger is a high quality, the Ultimate2 offers proven reliability and performance whilst being light to install and also easy to maintain. The model also offers flexible flue options for easy siting, and a modern bright LCD display with a simple to use interface.
  • 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
  • Uses familiar Glow-worm diagnostics for easy install & servicing
  • Compatible with full range of Glow-worm controls, flues and accessories
  • Ideal for use with innovative MiGo app based control
  • Wide range of accessories available including spacing frame and pipe cover plate


Standard 3 - 5 Business Days: £5.95

Express  1 - 2 Business Days: £9.95 

Free Standard Delivery On Orders Over: £250

We only dispatch orders between Monday to Friday.

All orders must be placed before 12pm, so they can be dispatched on the same working day.