Upgrade to a condensing boiler - and save
a third on heating bills.
Daily Mail, Wednesday, September 28th, 2005
Grandee Condensing Boilers –
What are they?
Condensing boilers are very high efficiency appliances with
combustion efficiencies around 95%. The extra efficiency compared
with a ‘standard’ boiler is achieved by extracting
virtually all useful heat from the combustion and flue products.
So efficient, in fact, that the flue gases are cooled sufficiently
to release their latent heat with the water vapour which is
produced in normal combustion being cooled to the point of
liquid condensate.
A Grandee condensing boiler would have a typical flue gas
temperature of 55°C compared with about 120 - 180°C
in a Grandee standard boiler and about 300°C in many typical
oil boilers.
How is this extra efficiency achieved?
In the boiler design, additional heat-exchanger capacity
has to be created to squeeze out this additional heat. As
heat is increasingly drawn from the flue gases the greater,
in inverse proportion, must be the heat absorbtion characteristics
to extract the available heat.
What happens to the condensate?
In a condensing appliance as efficient as Grandee, condensate
is produced continuously whilst the boiler is in operation,
and this condensate has to be run off into a drain or the
normal waste system of a dwelling. |
The
Heating World condensing unit is remarkably free
