Worcester Bosch Greenstar 27Ri Compact ErP Regular Boiler
The Worcester Bosch Greenstar 27Ri Compact Regular Boiler is one of the most popular models in the Worcester range — and for good reason. Compact, efficient, and built for reliability, it’s the ideal solution for small to medium-sized homes with a traditional heating and hot water system that includes a separate hot water cylinder.
As one of Worcester’s smallest condensing boilers, the Greenstar 27Ri can be neatly installed within a standard kitchen cupboard, making it perfect for homes where space is at a premium. Despite its size, it delivers powerful and consistent heating performance with A-rated ErP efficiency, helping you save on energy bills while keeping your home warm and comfortable.
Compact Design, Powerful Performance
The Greenstar 27Ri is designed for maximum flexibility and ease of installation. Its robust steel wall-mounting plate allows enough room for flow and return pipes to go behind the boiler, creating a clean and professional finish. Weighing just 22.7kg, it’s also a true one-person lift — making installation quicker, simpler, and less intrusive.
The compact design makes it ideal for replacing older regular boilers, especially in homes using S or Y plan systems. Plus, with multi-directional flue options, installers have more freedom in where the boiler can be sited.
Energy Efficient and Environmentally Friendly
With an ErP A rating and low NOx and CO? emissions, the Greenstar 27Ri is designed to meet the highest efficiency and environmental standards. The built-in heating temperature control ensures the boiler performs efficiently all year round, keeping fuel usage low while maintaining comfort.
It’s also compatible with Worcester Greenskies solar panels, offering homeowners the potential to further reduce energy costs and carbon emissions.
Smart Compatibility and Easy Controls
The Greenstar Ri range is compatible with a wide range of optional Worcester Bosch digital controls when used with a Greenstar Wiring Centre. This gives homeowners the flexibility to upgrade their heating system with programmable timers, thermostats, and even smart controls for more precise and energy-efficient heating management.
For ease of servicing and maintenance, the Ri’s single-panel front provides quick access to all major components, helping reduce downtime and service costs.
Technical Specifications
Specification Details
Brand Worcester Bosch
Model Greenstar 27Ri Compact ErP
Fuel Type Natural Gas
Type Regular (Heat Only) Boiler
Output 27kW
Efficiency (ErP) A-rated
Mounting Type Wall-mounted
Dimensions (HxWxD) 590 x 390 x 270mm
Weight 22.7kg
Colour White
Fitting Location Internal
Compatible Systems S and Y plan
Warranty 7 years (subject to Worcester Bosch terms and conditions)
EAN 4054925619126
MPN 7733600064
Product Code PN143171
Why Choose the Worcester Bosch Greenstar 27Ri?
Compact, efficient, and incredibly reliable, the Worcester Bosch Greenstar 27Ri is the perfect choice for homes with traditional hot water systems. It delivers exceptional heating performance, low running costs, and a discreet, space-saving design — all backed by Worcester Bosch’s 7-year guarantee for total peace of mind.
Frequently Asked Questions
1. What type of homes is the Worcester Greenstar 27Ri best suited for?
This boiler is ideal for small to medium-sized homes that use a regular (heat only) boiler system with a separate hot water cylinder and cold water storage tank.
2. Can the Greenstar 27Ri fit inside a kitchen cupboard?
Yes — it’s designed to be one of Worcester Bosch’s most compact boilers, fitting neatly into a standard kitchen cabinet without compromising on performance.
3. How efficient is the Worcester 27Ri boiler?
The Greenstar 27Ri offers A-rated ErP efficiency and includes built-in temperature controls to optimise energy usage, helping you save on heating bills while reducing your carbon footprint.
Check out our full range of plumbing supplies.
Browse more boilers available online.
