Brochure
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Advanced Condensing Technology
A gas-fired condensing boiler is one of the most economical and clean ways to generate
heat and can reduce your monthly heating bills, as well as your environmental footprint.
Condensing technology not only utilizes the
heat from the combustion of gas, but also the
unused heat that would escape up the
chimney with a conventional heating system.
Condensing boilers achieve excellent efficiency
by extracting almost all of the heat contained
in the flue gases and converting it into
additional heating energy. To do this,
Viessmann condensing boilers are equipped
with a corrosion-resistant, stainless steel Inox-
Radial heat exchanger, which cools the flue
gases before they are routed into the chimney.
By doing this, the water vapor contained
within the gases is deliberately condensed,
and the additional heat released is transferred
into the heating system.
By choosing a condensing boiler, you will not
only benefit from reduced monthly bills, but
will also make an active contribution
towards protecting the climate and the
environment.
Through the condensation of the water vapor contained in the flue gas, additional heat is extracted from the flue gas and
added back into the heating system. This increases efficiency and lowers your heating costs and environmental impact.
98%
90%
2%
+8%
Save money with a modern, gas-fired condensing boiler
Energy savings CO
2
savings (over 15 years)Cost savings (over 15 years)*
r
s)
Additional
energy savings
Additional CO
2
savings (over 15 years)
Additional
cost savings
(15 years)**
Increase your savings with a solar domestic hot water system
13% ($154 p.a.)
60% ($136 p.a.)
$ 3,600
$ 3,200
11.5 t
12 t
Savings shown in USD.
† 2005 Residential Energy Consumption Survey by the Energy Information Administration.
* Based on 83 MMBTU/p.a. (830 therm/2350m
3
) space heating load required (83% to 96% efficiency) at an average price of $0.40/m
3
($1.13/therm). Calculations include a 5% rise in energy prices per year.
** Based on 24 MMBTU/p.a. (240 therms/657m
3
) average annual household consumption for direct-fired hot water tank, 20 years of age at average gas price of $0.40/m
3
($1.13/therm).
Calculations include a 5% rise in energy prices per year.
of space heating gas
of DHW gas