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  • Warmflow U-SERIES Kitchen / Utility Condensing Conventional Oil Boiler 21-26kW
  • Warmflow U-SERIES Kitchen / Utility Condensing Conventional Oil Boiler 21-26kW
  • Warmflow U-SERIES Kitchen / Utility Condensing Conventional Oil Boiler 21-26kW
  • Warmflow U-SERIES Kitchen / Utility Condensing Conventional Oil Boiler 21-26kW

Warmflow U-SERIES Kitchen / Utility Condensing Conventional Oil Boiler 21-26kW
Reference: WFU90HE

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The Warmflow U-SERIES Utility Condensing Conventional Oil Boiler 21-26kW has been specifically designed to fit into the most common kitchen and utility room applications. The stylish white casing houses a highly-efficient heat exchanger that can be conveniently accessed from the front without the need to remove work surfaces.

Furthermore, the Warmflow U-SERIES Utility Condensing Conventional Oil Boiler 21-26kW is extremely quiet in operation, and is fitted with the proven technology of a Riello burner.

Why Buy A Warmflow Boiler?


  • Warmflow are a British company, with the largest market share of oil boilers in the UK
  • Fitted with a Riello burner - the world leader in burner technology
  • Full back-up service covering the whole of England, Scotland, and Wales
  • The most versatile flue system on the market - plastic flue system with inbuilt temperature control for total safety
  • Each boiler is produced in a brand new £2.5 million pound fully robotic manufacturing plant, ensuring 100% reliability and customer satisfaction
Please note: This is not a combination Boiler. Please call if you need assistance.

Please Note - a 'pre-pumped' version of this boiler is available as an option in the Product Options tab. This model includes the advantage of a factory-fitted and wired pump, for an easier conversion to a sealed system.

Warmflow U-SERIES U90HE Oil Boiler Features:


  • Easily-accessible, highly-efficient heat exchanger
  • Latest in Riello burner technology for complete reliability
  • Extremely quiet in operation
  • Finished in a stylish, high-gloss white casing
  • Designed to fit neatly under standard size work surfaces
  • Supplied for balanced flue applications
  • Suitable for use with Warmflow high efficiency 'easy-fit' flue systems
  • Ideal for use with systems designed to operate with a low return water temperature (underfloor heating, for example)
  • Can provide central heating only or central heating & hot water indirectly
  • Economical running costs thanks to SEDBUK A efficiency rating

Warmflow U-SERIES U90HE Oil Boiler Specifications:


Height 865mm
Width 413mm
Depth 600mm
Central Heating Output (kw) 21 - 26
Central Heating Output (btu) 71,694 - 88,764
Conventional Flue Size (mm) 100mm
Service Access Front/Top
Flow Connection 28mm Compression
Return Connection 1" BSP
Collection U-SERIES
Manufacturer Part Number U90HE

SEDBUK Band A Oil Boiler
Warmflow High Efficiency Complete Flue Sets
Warmflow Flue Component Options
Warmflow Plume Management Kits and Accessories
Warmflow Compatible Programmers
  • Warmflow PU1 White Programmer for Utility Boilers

    Warmflow PU1 White Programmer for Utility Boilers(WFPU1)

    £70.38 (£58.65 exc. VAT)
Sealed System Kits for use with Pre-Pumped version...
  • Warmflow Sealed System Kit Pressure Vessel, Pressure Gauge and Hoses for Utility Pumped Boilers

    Warmflow Sealed System Kit Pressure Vessel, Pressure Gauge and Hoses for Utility Pumped Boilers(WFSK1)

    £184.26 (£153.55 exc. VAT)
Protect your Central Heating System with Magnaclean
  • Adey MagnaClean Professional 22 mm Black

    Adey MagnaClean Professional 22 mm Black(608001)

    £116.65 (£97.21 exc. VAT)
Dimensional Diagram - Warmflow U-SERIES Kitchen / Utility Condensing Conventional Oil Boiler 21-26kW
Product Documents
  • Brochure Type: PDF Size: 3.74 MB Uploaded: 23rd May 2017
  • Flue Options Type: PDF Size: 1.44 MB Uploaded: 23rd May 2017

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