Worcester Bosch Greenstar 29CDi Classic
The Worcester Bosch Greenstar 29CDi Classic was one of the most popular combi boilers in the Greenstar range and remains installed in many homes today. While it is no longer manufactured, this page explains its specification, who it was designed for and your options for servicing, repairs or replacement. We continue to service and repair this model regularly across Buckinghamshire and Berkshire.
Need help with your 29CDi Classic? Request a free quote today.
What is the Greenstar 29CDi Classic?
The Greenstar 29CDi Classic is a wall-mounted gas combi boiler, designed to provide heating and instant hot water without the need for a separate cylinder or tank. As part of Worcester Bosch’s top of the range CDi Classic combi series, it was known for strong performance, high efficiency and reliable everyday operation.
Unlike a system boiler, a combi boiler heats water on demand directly from the mains. This makes it a practical and space-saving choice for homes that do not have a hot water cylinder, and means you never run out of stored hot water.
The 29CDi Classic was part of the Greenstar CDi Classic range, which won the Which? Best Buy award multiple times and set the benchmark for combi boiler efficiency in the UK.
> Explore the full Worcester Bosch Greenstar range
Greenstar 29CDi Classic: Key Specifications
Boiler type: Combi boiler
Central heating output: 30kW
Hot water output: 29kW
Efficiency rating: A rated / 89.1%
Fuel type: Natural gas or LPG
Dimensions: 760mm x 440mm x 360mm
Flow rate: 12.3 litres per minute
Frost protection: Yes
Smart control compatible: Yes, including Bosch EasyControl
Suitable for: 2 to 3 bed homes, up to 15 radiators, 1 to 2 bathrooms
Who is this boiler suitable for?
The 29CDi Classic was designed for small to medium homes with a moderate demand for heating and hot water. It is best suited to properties with:
- 2 to 3 bedrooms
- 1 to 2 bathrooms
- Up to 15 radiators
- No existing hot water cylinder
- Standard mains water pressure
If you have a larger property or higher hot water demand, the 34CDi Classic or 42CDi Classic would have been the more appropriate choice within the same range. If you already have a 29CDi Classic installed and are unsure whether to service, repair or replace it, our engineers can assess your system and give you honest advice.
Servicing and repairing your Greenstar 29CDi Classic
Although the 29CDi Classic is no longer manufactured, it can still be serviced and repaired. Parts remain widely available for this model and our Gas Safe engineers carry out full services and fault diagnosis across Buckinghamshire, Berkshire and surrounding areas.
Regular servicing is important for any boiler, but particularly for older models. An annual service helps to:
- Maintain efficiency and keep running costs down
- Identify worn components before they cause a breakdown
- Keep your boiler operating safely
- Satisfy any remaining warranty or insurance requirements
If your 29CDi Classic has developed a fault, our engineers carry a wide range of Worcester Bosch parts and aim to resolve most repairs in a single visit.
When to consider replacing your 29CDi Classic
If your boiler is over 12 to 15 years old or experiencing repeated breakdowns, replacement is often the more cost-effective long-term decision. The 29CDi Classic has been replaced by the Worcester Bosch Greenstar 4000, which offers meaningful improvements across efficiency, warranty and controls.
The Greenstar 4000 30kW is the natural modern equivalent for homes currently running a 29CDi Classic. It delivers better efficiency, a longer warranty and full compatibility with the Bosch EasyControl smart thermostat.
Greenstar 29CDi Classic vs Greenstar 4000 30kW
Efficiency: 89.1% vs up to 94%
Warranty: 2 to 5 years vs up to 10 years
Controls: Basic display vs smart control ready
ErP rating: A rated vs A rated
Status: Discontinued vs current model
> Learn more about the Greenstar 4000
Why choose Heppelthwaite Red Van Plumbers?
Fewer than 5% of UK installers achieve Worcester Bosch Platinum Accredited status. As Platinum Accredited Installers, we install, service and repair the full Greenstar range, including legacy CDi Classic models, across Buckinghamshire, Berkshire and surrounding areas.
- Platinum Accredited Worcester Bosch Installers
- Family-run business established 1948
- Gas Safe registered engineers
- Free fixed quotations with no hidden costs
- Up to 10-year warranty available on new Greenstar 4000 installations
FAQs – Worcester Bosch Greenstar 29CDi Classic
Is the Worcester Bosch Greenstar 29CDi Classic still available to buy?
No. The 29CDi Classic is no longer manufactured. The modern equivalent is the Worcester Bosch Greenstar 4000 30kW combi boiler, which offers improved efficiency and a longer warranty.
Can the Greenstar 29CDi Classic still be serviced?
Yes. Parts remain widely available and our Gas Safe engineers service and repair all CDi Classic models across Buckinghamshire and Berkshire. Annual servicing is recommended to maintain efficiency and safety.
What replaced the Greenstar 29CDi Classic?
The Greenstar 29CDi Classic was replaced by the Worcester Bosch Greenstar 4000. The 4000 offers up to 94% efficiency, smart control compatibility and up to a 10-year warranty when installed by a Platinum Accredited Installer.
How efficient is the Greenstar 29CDi Classic?
The 29CDi Classic achieves 89.1% seasonal efficiency with an ErP A rating. Modern replacements such as the Greenstar 4000 achieve up to 94%, which can make a noticeable difference to running costs over time.
What size home is the Greenstar 29CDi Classic suitable for?
The 29CDi Classic is suited to 2 to 3 bedroom homes with 1 to 2 bathrooms and up to 15 radiators. For larger properties or higher hot water demand, the 34CDi Classic was the more appropriate choice within the same range.
How long should a Greenstar 29CDi Classic last?
With regular annual servicing, a well-maintained 29CDi Classic can last between 12 and 15 years. If your boiler is approaching or has exceeded this age, it may be worth considering a boiler replacement to avoid repeated repair costs.
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