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Worcester Bosch Greenstar 21Ri Regular Gas Boiler

From: £2,099.00

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Worcester Bosch


Greenstar 21Ri Regular Gas Boiler

Is Condensing


Efficiency Rating


Band Rating

A Rating

LPG Compatible


Standard Warranty

Up to 10 Years

Central Heating Max. Output

21 kW


Wall Mounted

Flow Rate


ERP Rating

A Heat

Product Description

Worcester Bosch Greenstar 21Ri Regular Gas Boiler

The Worcester Bosch Greenstar 21Ri is a condensing regular gas boiler with an output rating of 21 kW.

How efficient is the Greenstar 21Ri?

If you’re looking for a heating system that could help to lower your energy bills then the Greenstar 21Ri is a great option thanks to a 92% efficiency rating and ErP A-rating for heat.

Is the output rating suitable for my home?

The 21kW output rating makes the Greenstar 21Ri ideal for installation in homes with 10-15 radiators and 1-2 bathrooms.

Does the Greenstar Ri range include any other outputs?

This range of regular boilers are available in a number of different outputs, including 12 kW, 15 kW, 18 kW and 24 kW in addition to this 21 kW model.

Is a regular boiler suitable for my home?

A regular boiler should be installed into properties as part of an open vent heating system. This means that in addition to the boiler there will also be a cold water tank in the loft and a hot water cylinder.

How long is the warranty period?

A 5 year warranty is available as standard which can be extended to 7 or 10 years when certain terms and conditions are met.

What are the key features of the Greenstar Ri?

Greenstar Ri boilers feature simple-to-use controls and can be paired with Greenskies solar panels. Plus, if you choose to have the boiler fitted into a garage or loft area, then the frost protection feature will prevent it from freezing during the winter months.

How big is this boiler?

Thanks to compact dimensions of 600 x 390 x 270mm (HxWxD) the Greenstar Ri can be installed into a standard kitchen cupboard.