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Ultimate₃ Regular (Open Vent) Boiler

High efficiency regular boiler from Glow-worm

  • High performance, ErP A rated regular boiler
  • Lightweight boiler with cupboard fit dimensions
  • Up to 10 years guarantee available*
Find your local Glow-worm Club Energy Installer

High performance

The Ultimate₃ regular boiler provides outstanding heating performance in a 25kW model, and is best suited to homes with high hot water demands, where a hot water storage cylinder and a cold water tank are already installed.

*FREE 5 year standard guarantee available. 10 year extended guarantee is only available for boilers registered through Club Energy with a Glow-worm Power System filter.

Specifications

Specifications

Ultimate₃, Regular Boiler25kW
Boiler dimensions (H x W x D mm)600 x 375 x 280
Maximum horizontal flue length 60/100 (m)10
Maximum vertical flue length 60/100 (m)10
PCDB seasonal efficiency (%)89.6
ErP ratingA

Related Products

Related Products

MiGo Link internet gateway

  • Remote access with the MiGo Link app
  • Enables weather compensation with compatible controls
  • Works with MiSet, MiGo Select and Climastat Select controls

MiSet

  • Touch interface allows fuss-free heating at your fingertips
  • Time programming assistant helps you set your timer in a few simple steps
  • Boiler modulation ensures peak performance and optimum efficiency for your Glow-worm heating system

MiGo Select smart control

  • Wireless, smart and simple room thermostat
  • Clear digital display
  • Boiler modulation

Climastat Select

  • Easy to use
  • Clear digital display
  • Simple & discreet 2 wire connection

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 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
  • Our 30kW and 35kW models suit homes of all sizes

Ultimate₃ System Boiler

  • Highly reliable system boiler offering outstanding performance
  • ErP A rated for efficiency – helping you to save money on your energy bills
  • Available in a 25kW model

Energy regular boiler

  • ErP A rated for efficiency - helping you to reduce your energy bills
  • Compact size – perfect in kitchen cupboards
  • Ultra quiet operation