The Greenstar 24Ri is a heat-only (regular) boiler. It’s the straightforward replacement if your home already has a hot water cylinder and a cold water tank. It’s small, light and quiet, and Worcester Bosch has a strong reputation for reliability. See your fixed price in our online quote.
Key specs
| Spec | Greenstar 24Ri |
|---|---|
| Boiler type | Regular (heat-only), condensing, wall mounted |
| Fuel | Mains gas |
| Heating output | 24 kW |
| Hot water flow rate | N/A (stored in a separate cylinder) |
| Efficiency | 92%, A-rated (ErP: A heating) |
| Manufacturer warranty | up to 10 years when fitted by a Worcester Bosch Accredited Installer |
| Dimensions (H x W x D) | 600 x 390 x 270 mm (approx.) |
Who it suits
- Two- to three-bedroom homes with one or two bathrooms.
- Homes with a traditional system (cylinder plus loft tank) that want a like-for-like swap with minimal pipework changes.
- Other outputs in the Greenstar Ri range run from 12Ri to 30Ri. Our online questions point you to the right size.
Why people choose it
- Works with your existing set-up: it pairs with your current cylinder and tank, and suits homes with high hot water demand.
- Solar-ready: it’s compatible with solar water heating.
- Smart controls: it works with Worcester Bosch Comfort+ controls and some third-party smart thermostats.
- Built-in frost protection for cold winters.
FAQs
What’s the difference between a regular boiler and a combi?
A regular boiler heats water stored in a cylinder and needs a cold water tank. A combi heats water on demand with no tanks. The 24Ri is a regular boiler.
How long does installation take?
Usually 1–2 days, depending on your existing system.
How long will it last?
With an annual service, typically 10–15 years.
Get your fixed price online
Answer a few quick questions about your home and you’ll see a fixed installed price straight away, with online booking.