Not all boilers are the same - just take a look at what the Ravenheat HE98 has to offer

30kW to domestic hot water (DHW) output with DHW flow rate of 12 litres through a 35oC rise.

Customer Benefits

  • A+ ErP
  • SEDBUK A Rate
  • 5 Year Guarantee*
  • OpenTherm Integrated
  • Efficiency Rating with Honeywell Control A+
  • Weather Compensation (optional)
  • Direct Wi-Fi Connection Kit (included)
  • Compact Size – 700mm High, 400mm Wide, 300mm Deep
  • ErP Compliant Controls and Pump
  • Backlit LCD
  • Whisper Quiet in Operation
  • User Friendly Touch Controls – Simple and Easy to Use
  • High Density Insulation
  • Low NOx Class 5
  • Minimum Low Power of 3.6kW Further Reduces Energy Cost
HE80 Sliding Control Panel
HE80 Boiler

Installer Benefits

  • Brass and Premium Branded Components for Lasting Quality
  • Integral Valve Kit Eliminates Unsightly Valves Below the Boiler
  • Easy Release Control Panel Allows Easy Access for Servicing
  • Built-in Deep Condensate Trap Designed to Reduce Nuisance Freezing in Winter
  • Flexible Condensation Pipe Conveniently Located After the Trap
  • Lightweight Design to Aid Installation
  • Removable Side Panels
  • Built-in Automatic By-pass

Simple yet innovative, the control display on the HE98 slides up with ease to allow easy access when servicing.

Smart Energy Saving

Designed incorporating energy saving innovation, the HE98 combi and system boilers puts style, quality and efficiency in a new class of its own.

The HE98 combination boiler has a high resolution backlit LCD screen, featuring customer friendly buttons for optimum operation, making it easy to use in poor light conditions. This feature enables the user to easily set the heating and hot water temperatures, central heating times and view the system pressure.

HE80 Display Screen

Smart Control

Ravenheat have been working closely with Honeywell to ensure our boiler and external
controls communicate in the best way possible to save energy while delivering heating comfort

Welcome to OpenTherm

Ravenheat OpenTherm boiler package provides more precise control directly from the room thermostat to the boiler’s software which operates the gas valve and modulating central heating pump. This allows the precise gas input requirement to match the varying demand signal i.e. if the house needs to be one degree warmer the control tells the boiler it can start at lower power. By reducing the flow temperature to a minimum of the heat required, the flow temperature is kept below the dew point (50°C), thus allowing the boiler to operate in condensing mode which is more efficient.

Without OpenTherm even with the best controls the boiler will always run at full power consuming significantly more energy (both gas and electric) affecting the homeowner’s energy bill. Whereas with our HE98 by just applying the necessary heat there is a significant saving available and all of this is done automatically by the boiler and its controls/package.

Efficiency is a major feature of Ravenheat’s new HE range, which boasts an A+ ErP energy efficiency rating. This makes it the first boiler manufacturer in the UK to bring A+ boilers in a single package price deal to installers.

WiFi Diagram

The HE98 stays true to the Ravenheat brand by offering premium components and features for straightforward installation and servicing. However, by offering the latest in smart home heating controls, these boilers are also able to take efficient home comfort to the next level.

The HE98 comes with OpenTherm operational compatibility as standard and comes complete with the Honeywell round modulating room stat and internet gateway for connection to the Honeywell Total Connect Comfort app. This is available to Android and iOS users free of charge via the App Store and allows customers to achieve greater efficiency and comfort in their homes, plus greater control either in the house or remotely via their smartphone.

The LCD backlit feature screen enables easier visual operation for both the homeowner and installer, while boiler touch controls make it simpler to set the heating and hot water temperatures and see the system pressure.

OpenTherm packs consist of a round stat (wired or wireless option), wi-fi gateway along with comfort app.

Flue Options

HE80 Inside View

The new HE98 can be fitted with either a 100mm standard (concentric), a 125mm flue duct or a twin (eccentric) flue duct, which can be installed either vertical or horizontal, depending on the customer’s requirement.

A one metre standard horizontal flue kit is supplied separately; this can extend to 8 metres if required, or 13 metres vertical (maximum without bends). The above flue arrangements should fit most requirements however, alternative systems (Twin or 125mm) are available.

See installation manual for all flue lengths and options.

Flue Items
PartDescription Flue 60/100Part No
11 metre horizontal flue kitPR5023016
2Straight flue header/Sample PointPR5094110A
31 metre high plume kitTER110101
41 metre flue extensionPRFE
545o in line flue bendPR45FBI
690o in line flue bendPR90FBI
7Flashing sleeve/plateTEG060050
81 metre vertical terminalTER110200
9Combi ridge terminal kitTER090100
1090o flue exhaust deflection bendCUR110100
1145o flue exhaust deflection bendCUR110050

Alternative systems (twin or 125mm) are available for longer flue distance.

Flue Diagram

Easily Installed Neat Connections

Neat Connections


Built to exacting ISO 9001 standards using quality components, all our boilers carry the European CE mark. Each Ravenheat appliance undergoes rigorous testing and operating procedure before being carefully packed for maximum protection, ready to leave our factory.

*Image for demonstration purposes only.

Boiler Specification

Central Heating Max/Min Output
(Adjustable Modulation)
KW4.0 - 26.2
Domestic Hot Water
Flow Rate Raised 30°CΔT
Inlet Temprature 35°CΔT


Domestic Hot Water Max/Min OutputKW4.0 - 30.0
Expansion Vessel18L
Maximum Central Heating TemperatureC80
Installation Clearance


80 - 150
Heating Flow & Return Compression Gas Connection
Domestic Supply (Cold) Compression
Domestic Supply (Hot) Copper
Condensing Pipe 3/4 Push Fit Overflow Pipe


Flue Sizemm100
Electrical Mains Supply100
230V 50HZ Fused 3amp
Nat Gas AB and A 2005/2009%90.3 / 88.9
NOx Class (lowest possible level)5
OpenTherm Compatible as StandardYes
Weather Compensator OptionYes
Noise leveldb52
Boiler Dimensions


Boiler must be correctly installed. Boiler must be commissioned by a Gas Safe registered engineer. Boiler must be registered with Ravenheat upon purchase (so 5 year warranty can be activated). Boiler must be correctly maintained and serviced by a qualified, competent person. For any other information please refer to the user guide and installation instructions.

Technical After-Sales Service

Ravenheat have a technical helpline at its central headquarters in Leeds. Service engineers or their customers have the satisfaction of knowing they will receive advice, and the knowledge that one of Ravenheat’s own technicians is on hand should an on-site visit be required. Ravenheat only use their own highly qualified technicians thereby ensuring the highest quality and most reliable customer care.

Ravenheat run their own unique comprehensive installer training programme working alongside the regulative bodies and trade associations. The training programme is open to any Gas Safe Registered installer. For further information visit our training days page or emailing us at [email protected].

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