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Regular Heat Only Boiler

Ultracom hxi

Available in 12 - 38kW

    • High Efficiency & NOx Class 5
    • Inbuilt programmer
    • Stainless steel heat exchanger
    • Onboard diagnostics
    • 2 Year Parts & Labour Warranty
  • Ultracom hxi

    Advanced range of High Efficiency condensing regular heat only boilers with inbuilt digital programmer and stainless steel heat exchanger available in 12 & 38 kW outputs.


    The Which? Best Buy award winner in 2010 Ultracom hxi regular heat only boilers completes the Ultracom range. Featuring an inbuilt digital programmer, the Ultracom₂provides two channel control for heating and domestic hot water.

    To activate the digital programmer in a regular heat only system, simply install with the Options Board for on/off functionality, or the Smart Wiring Centre and Glow-worm Climapro₂RF for advanced control. All available as accessories.

    This tried and tested boiler ticks all the boxes for performance and reliability, whilst providing a straightforward solution, and being simple to programme and use. 

    Note: The Ultracom hxi's inbuilt digital controls can be activated as required by fitting an options board or Smart Wiring Centre to the boiler. These must be purchased as an accessory in addition to the boiler.

    Key features

    • High Efficiency & NOx Class 5
    • Advanced diagnostics
    • Inbuilt frost protection
    • LPG compatible without conversion kit
    • High modulation
    • Bottom cover plate
    • 2 Year Parts & Labour Warranty*


    *Glow-worm’s Club Energy installers can offer up to 15 years of warranty. To register to become a Club Energy installer click here.

    To view the Terms & Conditions of the Glow-worm Guarantee please click here.

    Name Download File
    Controls Compatibility Chart PDF (26 KB)
    Flue Installation Instructions PDF (5 MB)
    High Efficiency Boiler Range Technical Guide PDF (3 MB)
  • Size & Performance

    Casing dimension (h w d)(mm)610x375x334610x375x334610x375x334
    Weight (packed)28kg28kg28kg
  • Performance

    CH output (kW) Min/Max5.0/12.05.0/15.05.0/18.6
    CH Condensing Max output (Kw)12,916,220
    SEDBUK rating 200590,50%90,50%90,40%
    SEDBUK rating 200988,70%88,70%88,60%
    Nox class 5 (natural gas)YesYesYes
    Adjestable to LPGYesYesYes
  • Construction & Installation

    Main heat exchanger typeCoiled TubeCoiled TubeCoiled Tube
    Heat Exchanger materialStainless SteelStainless SteelStainless Steel
    Burner TypePre-mixedPre-mixedPre-mixed
    Fully modulatingYesYesYes
    Suitable for sealed systemsYesYesYes
    Suitable for open-vent systemsYesYesYes
    Inbuilt Condensate Trap/siphonYesYesYes
    Inbuilt Boiler Frost ProtectionYesYesYes
    Continua ElectronicsTwo StageTwo StageTwo Stage
    Zero compartment VentilationYesYesYes
  • Clearences & User Interface

    Top (mm) (from top of boiler)150150150
    Side (mm)202020
    Bottom (mm)200200200
    Front (mm)*600*600*600*
    User Interface
    User displayDigitalDigitalDigital
    User adjustable CH Temp controlYesYesYes
    Optional inbuilt timer   
    Optional programmer**Yes**Yes**Yes**
  • Pipes & Flues

    Water connections2x22mm2x22mm2x22mm
    Max horizontal 60/100 mm10m10m10m
    Max vertical 60/100 mm 10m10m10m
    Max horizontal 80/125 mm25m25m25m
    Max vertical 80/125 mm25m25m25m
    Max direct rear flue   
    Optional plume management kit 60/100YesYesYes
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