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Essential combi boiler

Quality, Performance and Value

  • Exceptional value for money combi range
  • FREE 3 year guarantee with option to extend*
  • Sold with analogue timer and flue
  • 24kW and 28kW outputs available
  • Available from PHG merchants nationwide

The Essential boiler range is simple, highly efficient, reliable and easy to use, giving you a winning formula in the highly crowded and competitive market you're in.

Designed with a high quality and powerful aluminium heat exchanger, the Essential has leading features, a bright, easy-to-read, LCD display and comes with a 3 year guarantee as standard with the option to extend*. The Essential is delivered as a boiler, flue and analogue timer package and is supported by a UK brand you can trust with industry leading service, support and an award winning loyalty programme.

With the Glow-worm Essential you now have the opportunity to compete on quality, performance and value for money, turning a challenge into a lucrative opportunity for you.

Available exclusively at PHG merchants nationwide.

Features & benefits

  • Great value combi range with choice of 24kW or 28kW models
  • In-built analogue timer
  • Easy-to-use interface with LCD display
  • Simple, smart design
  • Light weight, aluminium heat exchanger providing great performance
  • Highly efficient, A rated boiler for ErP energy labelling to reduce energy bills
  • Modulating Grundfos pump for reduced energy use
  • Compatible with full range of Glow-worm controls, flues and accessories
  • 3 year parts and labour guarantee with an option to extend*

*when registered through Club Energy



Essential boilersUnits24kW28kW
Casing dimensions (H x W x D) mm740 x 418 x 300740 x 418 x 300
Weight (lift) kg3233
CH output
NOx class (natural gas) 55
DHW flow rate storage/combi (35°C rise)l/min10.011.7
SEDBUK rating 2009 89.389.3
ErP rating heating AA
ErP rating DHW AA
Suitable for sealed systems YesYes
Inbuilt adjustable system bypass YesYes
Inbuilt condensate trap/siphon YesYes
Inbuilt boiler frost protection 2 stageYes
Zero compartment ventilation YesYes
Top (from top of boiler)mm300300
Side mm0.50.5*
Bottom mm300300
Front mm²600600**
User Interface
User display Super Bright LCDAdvanced/Intuitive
Diagnostics AdvancedAdvanced
User adjustable CH temp control YesYes
User adjustable DHW temp control YesYes
Optional spacing frame YesYes
Water connections mm2x22/2x152x22/2x15
Maximum horizontal ø60/100m99
Maximum vertical ø80/125m2222
Optional plume management kit ø60/100 YesYes

*See manual for clearance if side panels are to be removed to assist future service and maintenance

** 5mm if removable panel/door

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