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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).

Specifications

Specifications

Ultimate₃ system boiler25kW
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 ratingA

Related Products

Related Products

MiGo personal heating assistant

  • Remote heating and hot water control
  • Automatically learns your energy needs
  • MiGo and Glow-worm boilers speak the same language

Climapro₂ RF control

  • Simple-to-use handheld unit can be wall mounted or portable within the living area
  • Backlit display provides advanced user control and functionality
  • Two channel wireless programmable room thermostat

Climastat

  • Easy to use
  • Extra low voltage
  • Simple & discreet 2 wire connection

Downloads

Downloads

How to get

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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.

Alternative products

Alternative products

Ultimate₃ combi boilers

  • Leading combi boiler offering outstanding performance
  • ErP A rated for efficiency – helping you to reduce your energy bills
  • FREE 5 year parts and labour guarantee

Ultimate₃ regular (open vent) boiler

  • High performance, ErP A rated regular boiler
  • Lightweight boiler with cupboard fit dimensions
  • FREE 5 year guarantee*

Energy system boilers

  • Compact size will fit perfectly in kitchen cupboards
  • ErP A rated for efficiency - helping you to reduce your energy bills
  • Quiet Mark approved*