Worcester Bosch Greenstar Ri

At a glance

• Configurations: Regular
• Best suited to: Homes with an existing vented (open) heating system and a hot-water cylinder
• Fuel: Mains natural gas (some variants are LPG-convertible, check the manufacturer’s data).

Specifications

Match the badge in front of you to a row before you use any of this. Every figure below was read from the Worcester Bosch literature listed under Sources at the foot of this page, checked 6 September 2026. Outputs, variants and part numbers change by year, so the appliance data plate is still the last word.

• These are the natural gas GC numbers printed in Worcester's own installation manuals. Worcester does not publish an output column alongside them, so take the kW from the badge rather than from the model name.

Where the data plate is

On the appliance fascia, where Worcester calls it the appliance identification label. The same badge carries the model, the serial number and the GC number.

Worth knowing on site

• A regular/heat-only boiler that works with a feed-and-expansion tank and cylinder.
• Sold in several outputs; confirm the exact kW from the appliance data plate.

On the tools

Regular boilers like the Ri turn up on jobs where converting to a combi was never on the table, typically because the home still relies on a vented cylinder and cold-water tank. Engineers commonly meet it on like-for-like replacements of an older heat-only boiler, Worcester Bosch or otherwise.

Variants and configuration

The Ri is sold in several outputs to match cylinder size and heat demand, and its display and controls are simpler than the combi and system Greenstar models since there is no instantaneous hot-water side to manage. Always check the exact output on the data plate before quoting.

Where it sits in the range

Unlike the numbered Greenstar combi and system ranges, the Ri is a dedicated regular (heat-only) product, reflecting that a meaningful share of UK homes still run a traditional cylinder-and-tank system rather than a combi. It commonly replaces older regular boilers of any brand.

Finding the manual and the data plate

For the exact outputs, gas rate, dimensions and commissioning figures, work from the appliance’s data plate and the manufacturer’s installation and servicing instructions. The GC (Gas Council) number and serial are on the data plate, usually behind the front panel or on the underside. Worcester Boschpublishes its manuals and support at Worcester Bosch support.