This Worcester Bosch Greenstar CDi Compact Combi boiler review delves into a space-saving powerhouse ideal for UK properties where efficiency meets compact design, offering reliable heating and hot water for homeowners and landlords alike.
Worcester Bosch Greenstar Cdi Compact Combi Boiler Review: At a Glance
| Aspect | Details |
| Boiler Type | Wall-hung combi (gas) |
| Outputs Available | 28kW, 32kW, 36kW |
| Efficiency | 94% (ErP A-rated for heat and hot water) |
| Hot Water Flow Rate | 10 l/min (28kW); 13.1 l/min (32kW); 14.3 l/min (36kW) at 35°C rise |
| Dimensions | 690 x 390 x 280 mm (H x W x D); 27.1kg |
| Warranty | 5 years standard (extendable to 10 years with accredited installer) |
| Estimated Supply Cost | £700–£1,000 |
| Estimated Installed Cost | £1,800–£2,800 (depending on setup and location) |
| Running Costs | Around £800–£1,200 annually for a typical 2-3 bedroom home, with savings from high efficiency |
| Maintenance & Servicing | Annual Gas Safe check required; simple access panels aid quick servicing |
| Trustpilot (Brand) | 4.6/5 from over 49,600 reviews |
| Which? (Brand) | Best Buy for reliability; high scores in efficiency and customer satisfaction |
| Best Suited For | Small to medium homes, 1-3 bedrooms, 1-2 bathrooms |
| Key Features | Compact design for cupboard fit, frost protection, compatible with smart controls, low NOx emissions |
The Worcester Bosch Greenstar CDi Compact Combi boiler excels as a slimline option for smaller to medium UK homes, delivering strong performance in tight spaces without compromising on output or reliability.
Pros and Cons
Pros:
- Ultra-compact design fits seamlessly into small spaces like cupboards.
- High efficiency reduces bills and supports eco-friendly homes.
- Strong hot water flow handles everyday demands in mid-sized properties.
- Reliable Worcester build with easy-to-use controls for simple operation.
- Extendable warranty offers long-term peace of mind for landlords.
Cons:
- Limited to smaller outputs, not ideal for very large or high-demand homes.
- Aluminium heat exchanger may require more care in hard water areas.
- Slightly higher noise levels during peak operation compared to premium models.
Efficiency
Efficiency for the Greenstar CDi Compact Combi reaches 94% with its condensing technology, capturing extra heat from exhaust gases to boost fuel utilisation and cut emissions. This A-rated performance helps reduce energy bills in well-insulated UK properties, especially with its modulation range adjusting output to match demand precisely.
Specs
Specs highlight the boiler’s compact build for space-limited installs, with outputs up to 36kW supporting up to 15 radiators and hot water flows suitable for simultaneous use in modest households. Its lightweight 27.1kg frame and dimensions make it one of Worcester’s slimmest, ideal for kitchens or utility areas.
Features and Technology
Features and technology include a user-friendly control panel with clear diagnostics, compatibility with Worcester’s Wave smart thermostat for remote app control, and built-in frost protection to safeguard pipes in cold snaps. The aluminium-silicon heat exchanger ensures durability, while low NOx levels meet eco standards for greener operation.
Cost of the Unit
Cost of the unit positions it as a mid-range choice, with supply prices from £700 for the 28kW model to £1,000 for 36kW, reflecting quality components without premium excess.
Cost with Installation
Cost with installation typically adds £1,000–£1,800 for Gas Safe professional fitting, including flue and condensate pipework, bringing totals to £1,800–£2,800 based on property complexity like conversions from older systems.
Running Costs
Running costs benefit from the 94% efficiency, potentially saving £150–£300 yearly over outdated boilers in a two-bedroom home, though actual figures vary with gas prices, insulation, and usage patterns for central heating and domestic hot water.
Which? and Trustpilot Ratings
Which? and Trustpilot ratings affirm Worcester’s strong reputation, with the brand earning Best Buy status for models like the CDi Compact due to high reliability and efficiency scores. Trustpilot reflects 4.6/5 from over 49,600 users, praising responsive support and value in real-world use.
Ready for a reliable upgrade? Request a new boiler quote from Boilers 2 Go to find efficient solutions tailored to your space.
Is the Worcester Bosch Greenstar Cdi Compact Combi Boiler Right for You?
The Worcester Bosch Greenstar CDi Compact Combi boiler shines in constrained setups with solid performance. Consider these factors to see if it aligns with your needs.
Choose the Worcester Bosch Greenstar CDi Compact Combi boiler if…
- Space is at a premium in your flat or small house, needing a cupboard-fit unit.
- You seek A-rated efficiency to lower bills in a 1-3 bedroom property.
- Reliable hot water for one or two bathrooms fits your household routine.
- Extendable guarantees and smart control options appeal as a homeowner.
Don’t choose the Worcester Bosch Greenstar CDi Compact Combi boiler if…
- Your home has multiple bathrooms requiring higher flow rates.
- Budget allows for premium features like quieter operation or advanced tech.
- Larger properties demand more powerful outputs for extensive heating.
Need a New Boiler Quote?
Discover compact, efficient heating options—request a new boiler quote from Boilers 2 Go. Our experts provide personalised advice and competitive pricing for seamless installations.
FAQs
How Does the CDi Compact’s Modulation Work in Practice?
The boiler’s modulation adjusts output from 7.7kW to full power automatically, maintaining steady temperatures and reducing cycling for smoother, more efficient running in variable weather.
What Accessories Enhance the CDi Compact’s Performance?
Adding a Worcester magnetic filter protects the heat exchanger from debris, while a scale inhibitor suits hard water areas to extend lifespan without major overhauls.
Can the CDi Compact Integrate with Renewables?
It supports solar thermal preheating via optional valves, allowing hybrid setups to boost efficiency by using solar-heated water before gas activation.
What Diagnostic Tools Does the CDi Compact Offer?
Built-in error codes display on the panel for quick troubleshooting, with optional app connectivity providing remote alerts to preempt issues before they escalate.
How Does the CDi Compact Compare to Non-Compact Models in Noise?
At around 52dB max, it’s comparable to a quiet fridge, but its compact fan may sound slightly more noticeable than larger models with bigger soundproofing.
I’m Penny North, a home energy heating expert. My mission is to demystify new boilers and complex heating systems to help you achieve a warm, cosy home with lower energy bills and a smaller environmental footprint.