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*The friction stir welding process is used under license from The Welding Institute. †Terms and conditions apply.
End user benefi ts
•
Simple and intelligent control options
available, optimising boiler effi ciency and
fuel consumption
•
Condenses in CH and DHW mode, resulting
in greater effi ciency and fuel savings
•
Comfort and ECO modes to suit hot water
delivery needs
•
Fully modulating pump for reduced
electricity consumption and quieter
operation
•
Built-in frost protection of the boiler and
the surrounding pipes
•
Includes internal keyed fi lling link
•
Optional Worcester Keyless Filling Link
available as an upgrade, making system
re-pressurisation easy
•
5 year guarantee on plate heat exchanger†
•
10 year guarantee on Worcester primary
heat exchanger†
•
Boiler protection plans available.
WB7 heat exchanger
At the heart of the Greenstar CDi
Compact is the ground-breaking
WB7 heat exchanger, which uses
advanced friction stir welding*
to create more passageways than
traditional heat exchangers. These
channels provide more effi cient
circulation, resulting in a more
effective heat transfer and
quieter operation.
Designed, tested and manufactured
within Bosch Thermotechnology
Ltd., the WB7 heat exchanger
delivers high output despite its
compact size.
Friction stir welding
Friction stir welding is a solid state
machining process where the metal
is softened rather than melted,
giving improved quality, reliability
and performance.
Widely used for demanding
applications in the aviation, marine
and automotive sectors, it has
enabled Worcester to manufacture
a more compact heat exchanger,
reducing the overall size of the
boiler while delivering a high power
ratio of up to maximum 36kW.
To view a video of the friction
stir welding* process, please visit
www.worcester-bosch.co.uk/
stir-welding-video
On the primary
heat exchanger†
The Greenstar CDi Compact boiler is
recommended by the Energy Saving
Trust (EST). The Energy Saving Trust
is a non-profi t organisation that
provides free and impartial advice
on how to save energy.
WB7
Heat Exchanger
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