Worcester Greenstar 8000+ 40kW Combi Boiler
The Worcester Greenstar 8000+ 40kW Combi Boiler is a premium, high-efficiency combi boiler designed to deliver powerful heating and instant hot water for modern homes. As part of Worcester Bosch’s flagship 8000+ range, it brings together outstanding performance, stylish design and smart technology to create a reliable and energy-efficient solution for everyday living.
Because it’s a combination boiler, it produces hot water on demand without the need for a separate cylinder or storage tank — perfect for properties where space is limited but high performance is still required. Its advanced condensing technology improves efficiency by recovering heat that would normally be lost, helping to keep running costs down.
With a full-colour touch display, near-silent operation and compatibility with leading smart thermostats, the Greenstar 8000+ 40kW is designed for homeowners who want both convenience and top-tier reliability from their heating system.
Key Features
Combi system delivers heating and hot water instantly
Ideal for medium to large homes needing higher hot water performance
A-rated efficiency for both heating and hot water
Full-colour digital touch screen for simple control and diagnostics
Ultra-quiet performance, suitable for central living areas
Modulating pump automatically adjusts output to reduce energy usage
Smart thermostat compatible, including Bosch EasyControl
Technical Specifications
Manufacturer: Worcester Bosch
Model: 8000+
MPN: 7736702582
SKU: 94058
GTIN: 4069143014356
Performance:
Boiler CH Output: 33 kW / 114,989 BTU
Max DHW Output: 40 kW
Hot Water Flow Rate: 17.0 L/min @ 35°C rise
ErP Heating Rating: A Rated
ErP Hot Water Rating: A Rated
Dimensions:
Height: 780mm
Width: 440mm
Depth: 365mm
Weight: 47kg (55kg gross)
Warranty:
8 Years (subject to manufacturer T&Cs)
FAQs
Is the 40kW model suitable for larger homes?
Yes — its high output and strong flow rate make it ideal for medium to large properties, especially those with higher hot water needs.
Does this boiler need a hot water cylinder?
No. As a combi boiler, it provides hot water instantly without needing a cylinder or loft tank.
Can I use this boiler with a smart thermostat?
Absolutely. It’s fully compatible with smart controls like Bosch EasyControl, Hive, and Nest for remote heating management.
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