Worcester Bosch Greenstar 38CDi Classic
The Worcester Bosch Greenstar 38CDi Classic was one of the most powerful combi boilers in the Greenstar CDi Classic range and remains installed in many larger 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, Berkshire, West London and surrounding counties.
Need help with your 38CDi Classic? Contact our Worcester Bosch accredited and Gas Safe engineers.
What is the Greenstar 38CDi Classic?
The Greenstar 38CDi Classic is a wall-mounted gas combi boiler, sitting between the 34CDi and 42CDi Classic in the Greenstar CDi range. With a hot water output of 38kW and a flow rate of 16.4 litres per minute, it was designed for larger homes with multiple bathrooms and a high demand for heating and hot water.
As a combi boiler, it provides heating and instant hot water on demand directly from the mains without the need for a separate cylinder or storage tank. The 38CDi Classic was capable of running two showers simultaneously, making it a popular choice for busy family homes with 4 to 5 bedrooms.
The 38CDi 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 38CDi Classic: Key Specifications
Boiler type: Combi boiler
Central heating output: 30kW
Hot water output: 38kW
Efficiency rating: A rated / 92%
Fuel type: Natural gas or LPG
Dimensions: 760mm x 440mm x 360mm
Flow rate: 16.4 litres per minute
Frost protection: Yes
Smart control compatible: Yes, including Bosch EasyControl
Suitable for: 4 to 5 bed homes, up to 14 radiators, 2 bathrooms
Who is this boiler suitable for?
The 38CDi Classic was designed for larger homes with a high demand for heating and hot water. It is best suited to properties with:
- 4 to 5 bedrooms
- 2 bathrooms
- Up to 14 radiators
- No existing hot water cylinder
- Good mains water pressure
The flow rate of 16.4 litres per minute makes the 38CDi Classic well suited to homes that regularly need to run two showers at the same time. For smaller homes, the 34CDi Classic was the more appropriate choice in the same range. For homes with even greater demand, the 42CDi Classic offered the highest output. If you already have a 38CDi 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 38CDi Classic
Although the 38CDi 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, West London and surrounding counties.
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 38CDi 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 38CDi 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 38CDi Classic has been replaced by the Worcester Bosch Greenstar 8000 Life, which is the most suitable modern equivalent for larger homes with high hot water demand.
The Greenstar 8000 Life 35kW is the natural modern equivalent for homes currently running a 38CDi Classic. It delivers better efficiency, a longer warranty and full compatibility with the Bosch EasyControl smart thermostat.
Greenstar 38CDi Classic vs Greenstar 8000 Life 35kW
Efficiency: 92% vs up to 94%
Warranty: 2 to 5 years vs up to 12 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 8000 Life
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, West London and surrounding counties.
- Platinum Accredited Worcester Bosch Installers
- Family-run business established 1948
- Gas Safe registered engineers
- Free fixed quotations with no hidden costs
- Up to 12-year warranty available on new Greenstar 8000 Life installations
> Request a free quote or call 01628 533 550
FAQs – Worcester Bosch Greenstar 38CDi Classic
Is the Worcester Bosch Greenstar 38CDi Classic still available to buy?
No. The 38CDi Classic is no longer manufactured. The modern equivalent for larger homes is the Worcester Bosch Greenstar 8000 Life 35kW combi boiler, which offers improved efficiency and a longer warranty.
Can the Greenstar 38CDi Classic still be serviced?
Yes. Parts remain widely available and our Gas Safe engineers service and repair all CDi Classic models across Buckinghamshire, Berkshire and West London. Annual servicing is recommended to maintain efficiency and safety.
What replaced the Greenstar 38CDi Classic?
The Greenstar 38CDi Classic was replaced by the Worcester Bosch Greenstar 8000 Life. The 8000 Life offers up to 94% efficiency, smart control compatibility and up to a 12-year warranty when installed by a Platinum Accredited Installer.
How efficient is the Greenstar 38CDi Classic?
The 38CDi Classic achieves 92% seasonal efficiency with an ErP A rating. Modern replacements such as the Greenstar 8000 Life achieve up to 94%, which can make a noticeable difference to running costs over time.
What size home is the Greenstar 38CDi Classic suitable for?
The 38CDi Classic is suited to larger homes with 4 to 5 bedrooms, 2 bathrooms and up to 14 radiators. For smaller properties the 34CDi Classic was the more appropriate choice, while the 42CDi Classic was better suited to homes with even greater demand.
How long should a Greenstar 38CDi Classic last?
With regular annual servicing, a well-maintained 38CDi 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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