HIGH PERFORMANCE COMBI
25kW to domestic hot water (DWH) output with a flow rate of 10.2 litres through 35o rise
- 2 Year Guarantee*
- SEDBUK A Rate
- Compact in Size – 700mm High, 400mm Wide and 300mm Deep
- Innovative Low Energy Consumption
- Exceptionally Quiet in Operation
- Large Digital Visible Temperature Adjustment
- User Friendly Touch Controls, Simple and Easy to Use
- Integral Valve Kit Eliminates Unsightly Valves Outside the Boiler
- Built-in Deep Seal Condensation Trap Designed to Reduce Nuisance Freezing in Winter
- Flexible Condensation Pipe Conveniently Located After the Trap
- Manual and Automatic Air Vent Allows Air Out of the System More Easily When Commissioning
- Brass and Premium Branded Components for Lasting Quality
- The High Density Foam Lining of the CS80 Keeps Heat In and Allows for Quiet Operation
- Removable Side Panels
- Built-in Automatic By-pass
- Low NOx Class 5 Meets New Stringent Building Codes
- Solar Compatible
- Minimum Low Power of 3.6kW Further Reduces Energy Cost
- Greater Energy Saving Through the Appliance Modulating
- Lightweight Design to Aid Installation

Flue Options

The new CS80 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 options.
Part | Description Flue 60/100 | Part No |
1 | 1 metre horizontal flue kit | PR5023016 |
2 | Straight flue header/Sample Point | PR5094110A |
3 | 1 metre high plume kit | TER110101 |
4 | 1 metre flue extension | PRFE |
5 | 45o in line flue bend | PR45FBI |
6 | 90o in line flue bend | PR90FBI |
7 | Flashing sleeve/plate | TEG060050 |
8 | 1 metre vertical terminal | TER110200 |
9 | Combi ridge terminal kit | TER090100 |
10 | 90o flue exhaust deflection bend | CUR110100 |
11 | 45o flue exhaust deflection bend | CUR110050 |

Alternative systems (twin or 125mm) are available for longer flue distance.
Easily Installed Neat Connections

Quality
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.
We only use high quality components from leading industry manufacturers: Honeywell, Grundfos and Giannoni.
*Image for demonstration purposes only.
Boiler Specification
Model | CS80(T) | |
Central Heating Max Output (Adjustable Modulation) | kW | 3.6 – 21.4 |
Domestic Hot Water Max Output (Adjustable Modulation) | kW | 3.6 – 25.4 |
Domestic Hot Water | ||
Flow Rate Raised 30oC△t | I/Min | 11.9 |
Inlet Temperature 35oC△t | I/Min | 10.2 |
Expansion Vessel | 1 | 8L |
Maximum Central Heating Temperature | oC | 80 |
Installation Clearance | ||
Side | mm | 2 |
Top | mm | 125 |
Below | mm | 80 - 150 |
Connection | ||
Heating Flow & Return Compression | mm | 22 |
Gas Connection | mm | 15 |
Domestic Supply (Cold) Compression | mm | 15 |
Domestic Supply (Hot) Copper | mm | 15 |
Condensing Pipe ¾ Push Fit Overflow Pipe | ||
Flue Size | mm | 100 |
Electrical Mains Supply | 230v 50Hz Fused 3amp | |
Nat Gas Band A 2005/2009 | % | 90.3/88.9 |
Nox Class (lowest possible level) Available with or without timer | 5 |

CONDITIONS OF 2 YEAR WARRANTY
Boiler must be correctly installed. Boiler must be commissioned by a Gas Safe registered engineer. Boiler must be registered with Ravenheat upon purchase (so 2 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. For more information on warranties please view our Warranty Terms & Conditions.
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].
