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Ultimate₃ combi boiler

Exclusive combi boiler with 10 years guarantee*

  • Leading combi boiler offering great performance
  • FREE 10 year guarantee when registered on Club Energy*
  • £15 reward when registered through Club Energy
  • Available in 30kW and 35kW models

The Ultimate3 combi boiler provides central heating and hot water without the need for a cylinder to store water. The Ultimate3 combi is available in a choice of 30kW and 35kW models and features high DHW flow rates, flexible flue options and an aluminium heat exchanger for proven reliability and performance. The Ultimate3 also features a Grundfos modulating pump for reduced energy use and a modern bright LCD display with an easy to use interface.

The complete Ultimate₃ range (available in combi, system and regular (open vent) options) is compatible with the full range of Glow-worm controls including the popular MiGo app based control.

The Ultimate₃ also comes with a £15 reward and a free 10 year guarantee* when registered through Club Energy; where installers can also benefit from business tools including the Plumbing Toolbox app, Gas Safe Notifications, Benchmark and some great rewards

Features & benefits

  • Modern bright LCD display - Excellent clarity of boiler information, making it easy to change and confirm settings in dimly lit areas.
  • High efficiency - ErP 94% A rated boiler that helps reduce energy bills.
  • High efficiency modulating Grundfos pump - Lower running costs as the pump adapts to actual heating and hot water demand.
  • 10 year guarantee - Parts and labour guarantee for 10 years when registered through Club Energy.*
  • Heat exchanger - Made with high grade aluminium for proven and reliable performance.
  • Exclusive to City Plumping Supplies and Plumbing Trade Supplies

*When purchased from City Plumbing Supplies using the relevant pack code. For more information visit



Ultimate₃ combi boilerUnit30kW35kW
Article number 00100214040010021405
Gas Council number 47-019-5547-019-57
Boiler dimensions (H x W x D)mm740 x 418 x 300740 x 418 x 300
Nominal heat output range at 50/30˚C
(Condensing mode)
kW6.3 - 26.57.4 - 26.5
Nominal heat output range at 80/60˚C
(Non condensing mode)
kW6 - 25.27 - 26.3
Domestic Hot Water
Lowest water pressure to operate boilerbar0.20.2
Domestic hot water flow rate (at DT = Δ35K)l/min12.414.4
Heat exchanger material AluminiumAluminium
Boiler lift weight (Dry boiler)kg2222
ErP efficiency%9494
ErP decibel rating (sound power)dBa5152
PCDB seasonal efficiency%89.689.7
Flueing options
Maximum horizontal flue length 60/100m106
Maximum vertical flue length 60/100m1010

For full specification, please download here (2878 kB).

Related Products

Related Products

Climapro₂ RF Control

  • Two channel wireless programmable room thermostat
  • Backlit display provides advanced user control and functionality
  • Capable of room and weather compensation*

Introducing MiGo

  • Wi-Fi thermostat and easy-to-use app
  • Manage heating and hot water from anywhere
  • Reduces energy consumption, saves money

Climastat room thermostat

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

Climapro₁ control

  • Annual service reminder function
  • Automatic update for summer and winter
  • Simple and discreet



Alternative products

Alternative products

Ultimate₃ system boiler

  • ErP A rated for efficiency - helping to reduce energy bills
  • FREE 5 year guarantee when registered on Club Energy*
  • £15 reward when registered through Club Energy
  • Available as 25kW model

Ultimate₃ regular boiler

  • ErP A rated for efficiency - to reduce energy bills
  • £15 reward when registered through Club Energy
  • Lightweight boiler with cupboard fit dimensions
  • FREE 5 Year guarantee when registered on Club Energy*