Worcester Greenspring CWi47 Technical And Speci?Cation Information page 7

Why should I consider changing my boiler?
It's surprising but true; older boilers can be as little
as 60% efficient and even many comparatively modern
boilers are still only 70-75% efficient. Compare that
to Worcester Greenstar condensing boilers which
are more than 90% efficient.
Put another way, with our condensing boilers more than
90p of every £1 you spend on fuel for your boiler is used
effectively for your heating and hot water.
What makes a condensing boiler so efficient?
Condensing boilers work by recovering the waste
heat which is expelled through the flue system of a
non-condensing boiler and passing it through a second
heat exchanger where it extracts additional heat*.
This is why it makes such good sense to switch to an
award-winning Worcester boiler. With a boiler that's 10
years old or more, which doesn't have the benefit of today's
condensing technology, as much as 30%** spent on fuel
for your heating and hot water is wasted. It could make a
big difference to your household energy bills, saving you
money and helping to reduce your carbon footprint at the
same time.
Combine a new Greenstar boiler with the latest in digital
and intelligent heating controls and you can make your
money go even further.
Measure
Condensing boiler &
heating controls upgrade
Source: Energy Saving Trust
* When operating in a condensing mode a visible plume is generated from the flue terminal. Consideration should be given to this when siting the boiler.
Further details can be found within our Technical and Specification brochures on condensing boilers.
**Source: Energy Saving Trust. †Exceptions can apply. ††Energy Saving Trust (Publication CE102).
Annual CO saving
2
saving (£/yr) a year
Around £300 Up to 1,100kg
Changes to the Building Regulations in recent years mean
that in virtually all new and replacement boiler installations†
a high efficiency condensing boiler must be used.
Your home's energy rating
The Energy Performance Certificate (EPC) is required by
anyone selling a home. It rates a home's energy efficiency,
giving potential buyers an idea of how green, or how
costly, their new home will be. It is widely recognised
that installing a high efficiency condensing boiler will
improve your home's rating. Some Greenstar gas boilers
are also compatible with a Greenstar Plus - Hybrid system.
One more way to help improve the energy efficiency rating
of your home, and to significantly reduce your fuel bills
and carbon dioxide emissions, is to install a solar water
heating system. All Greenstar regular and system boilers
can be used with a Worcester Greenskies solar water
heating system to generate your hot water (see page 31).
Depending on the positioning of the solar panels, they
could provide up to 60%†† of your annual hot water free
of charge from a clean, renewable source of energy.
Look for the symbol to indicate boilers which are
solar compatible.
Worcester Energy Houses
Worcester's Energy Houses are real-life case
studies which show the difference that switching
to Worcester products can make to your bills,
your lifestyle and the environment.
You can see how we could help you reduce
your energy consumption by visiting
www.worcester-bosch.co.uk/energyhouses
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