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Worcester Greenstar 4000 ERP System Boilers
Regular price
£1,395.00
inc. VAT
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Worcester Greenstar 4000 System Boiler 12-24kW Range
The Worcester Greenstar 4000 System Boiler range (12-24kW) provides efficient central heating solutions for homes with stored hot water cylinders. Available in **12kW, 15kW, 18kW, 21kW and 24kW** models, these **A-rated condensing system boilers** feature identical compact dimensions with built-in pumps and expansion vessels for versatile installation in space-limited locations.
Key Features
- Compact Design: Uniform 724 x 400 x 310mm footprint across all models fits kitchens and cupboards.
- Wide Power Range: 12-24kW outputs suit small to large properties with cylinder systems.
- Integrated Components: Built-in pump, expansion vessel and optional diverter valve simplify installation.
- ErP A-Rated: High efficiency performance meets latest energy regulations.
- EasyControl Ready: Compatible with Bosch wireless controls and programmers.
- Quiet Operation: Low noise levels suitable for living areas (up to 42dB).
Technical Specifications
| Model | MPN | Output | EAN | Dimensions | Warranty |
|---|---|---|---|---|---|
| 12kW | 7733600377 | 12 kW (40,000 BTU) | 4057749856661 | 724×400×310mm | 7 Years |
| 15kW | 7733600379 | 15 kW | 4057749856685 | 724×400×310mm | 7 Years |
| 18kW | 7733600381 | 18 kW | 4057749856708 | 724×400×310mm | 7 Years |
| 21kW | 7733600383 | 21 kW | 4057749856722 | 724×400×310mm | 7 Years |
| 24kW | 7733600385 | 24 kW | 4057749856746 | 724×400×310mm | 7 Years |
Why Buy
The Greenstar 4000 System range offers consistent quality across five power outputs, ensuring the perfect match for any home size while maintaining the same compact, installer-friendly design. Built-in components reduce installation time and A-rated efficiency delivers running cost savings. Worcester Bosch provides 7-year guarantees on all models when installed by Gas Safe engineers.
Suitable For
- Small to large homes requiring system boilers with hot water cylinders.
- Properties needing compact, high-efficiency heating solutions.
- New builds, replacements and extensions across various property sizes.
Select your power requirement from Britain's best-rated system boiler range for reliable, efficient heating performance.
- Type Gas System Boilers
- Vendor Worcester Bosch
- SKU 7733600377
BTU & WATT Calculator
Room Dimensions
Room Type
Living Room
Bedroom
Kitchen
Bathroom
Conservatory
Hallway
Glazing Type
Single Glazed
Double Glazed
Triple Glazed
External Walls
0 Wall
1 Wall
2 Walls
3 Walls
4 Walls
Insulation Level
Poor
Average
Good (New Build)
Required Heating
0
Watts
0
BTUs