These boilers are available in 4 different outputs which means that there’s one to suit small, medium and larger properties. The Greenstar Ri Regular boilers are used with a heating system that includes stored hot water in a cylinder.
The Greenstar Ri boilers have a fascia-mounted heating temperature control knob and neon operational status indicator.
For further peace of mind, every boiler in Worcester’s Greenstar gas and LPG condensing boiler range has been awarded a Which? Best Buy accreditation.
5 year boiler guarantee until 30th June 2013 (terms and conditions apply). See promo page for details.
10 year guarantee on primary heat exchanger.
Central heating output: 18kW
- This boiler is registered with the Energy Saving Trust.
- This boiler is compatible with Greenskies solar panels
Features and benefits
- Best official boiler efficiency rating (SEDBUK band A)
- 5 year boiler guarantee until 30th June 2013, terms and conditions apply (standard guarantee: 2 years)
- 10 year guarantee on primary heat exchanger (subject to terms and conditions)
- Compact dimensions - can fit within kitchen cupboard
- Built-in heating temperature control
- Compatible with Greenskies solar panels
- Low NOx and CO2 emissions - environmentally friendly
Multi-directional fluing for siting flexibility
For ease of installation, flow and return pipes can be plumbed in from above or below the boiler
- Lift weight: just 22.6kg - the lightest boiler in its class
Technical data table
|NOx classifications (mg/kWh)||84|
|SEDBUK value %/band - LPG||91.4% / Band A|
|SEDBUK value %/band - natural gas||90.1% / Band A|
|Output to central heating and domestic hot water||6 - 18kW (20,472 - 61,416Btu/hr)|
|Maximum horizontal flue (100mm Ø)||4,600mm (inc. terminal)|
|Maximum vertical flue (100mm Ø)||6,400mm (inc. terminal)|
|Maximum horizontal flue (125mm Ø)||13,000mm (inc terminal)|
|Maximum vertical flue (125mm Ø)||15,000mm (inc. terminal)|
|Gas connection||22mm compression|
|Heating flow and return connections||22mm compression|
|Maximum flow temperature||82ºC (180ºF)|
|Primary water content||1.1 litres|
|NOx class||Class 4|
|Noise output level||43.7 dB(A)|
|Product guides and brochures|
|Greenstar gas boiler brochure
A guide to our gas boilers and choosing the best boiler for your home.
|8 716 109 642|
|Product guide for gas boilers and solar heating
Quick pocket-sized reference for trade professionals on gas boilers and solar water heating.
|8 716 116 255|
|Gas boiler wiring guide||6 720 646 965|
|Installation and servicing instructions for Greenstar Ri (manufactured Aug 08 - Dec 10)||8 716 115 168|
|Installation and servicing instructions for Greenstar Ri (manufactured from Jan 11 onwards)||6 720 644 744|
|Installation and servicing instructions for Greenstar Ri (manufactured March 2005 - July 2008)||8 716 112 052|
|Tech and spec for wall mounted gas regular boiler||8 716 115 774|
|User manual for Greenstar Ri (manufactured Aug 08 - Jan 11)||8 716 115 172|
|User manual for Greenstar Ri (manufactured from Dec 2010)||6 720 644 865|
|User manual for Ri (manufactured March 2005 to July 2008)||8 716 109 698|
|CondenseSure brochure||8 716 116 559|
|CondenseSure Siphon - Installation instructions||6 720 803 103|
|Greenstar 18Ri and 24Ri LPG conversion kit||8 716 111 859|
|Greenstar low loss header bulletin||L-loss PB 12/2011|
|Installation Instructions for Greenstar System Filter||6 720 803 839|
|Ri syphon fitting instructions||8 718 683 176|
|60/100mm horizontal flue instruction manual||6 720 644 842|
|60/100mm Vertical flue kit instructions||6 720 611 739|
|80/125mm 45° flue duct kit instructions||6 720 641 098|
|80/125mm 90° flue duct kit instructions||6 720 641 097|
|80/125mm flue extension kit instructions||6 720 641 099|
|80/125mm horizontal flue instructions||6 720 611 436|