That depends on your motivation. If it is purely economic and that
really were the motivation then that may be the case.
However, if you are also concerned about CO2 and NOx emissions and
fossil fuel consumption then it may be a factor.
There is no reason to assume that a well designed and made (and I
emphasise well designed and made) condensing boiler would be any less
reliable than a simplistic one with mechanical parts.
For example, the flame failure thermocouple used in most "simple"
boilers is an item that fails regularly. Granted they only cost £2 as
a part, but if professional labour is used to fit then that goes up to
at least £50 if not more. Bimetallic thermostats aren't that
brilliant either. Other components such as gas valves are of
similar technology and used in both cases.
That only leaves a fan, some thermal sensors, a microprocessor board
and the condensate drain arrangement. Provided the electronics are
of good design, using good quality components and not situated in a
hot part of the case, reliability should be high. There is very
little in a condensate drain.
Condensing technology is only relatively new in the UK, and it is well
known that several manufacturers made a pig's ear of their early
However, in most of the rest of Europe, notably Holland and Germany,
condensing technology has been commonplace for 15 years.
German consumers are noted for their expectation of reliability and
good engineering so had condensing products been flakey for any length
of time, it would not have survived.
where you will note that there is a lot of emphasis on quality
Ferroli are highly regarded, no divertor valve to go wrong. £499 for 80kW
model from www.mrcentralheating.com
The Ariston microgenius are another good make. I've had excellent service
from their UK techie people.
27kw model is £539 from same outlet.
Ferroli are not highly regarded by me! We have a Ferroli Modena 1200 (with
8 rads and a decent shower as it happens), and it has given nothing but
trouble in the last 2 years. It's my first experience of a combi, and
possibly the last. It's noisy, unreliable and produces only a trickle of
hot water in the winter.
(to e-mail me, swap uk and yon in address)
I agree. Best get the Ferroli Modena 102 rather than the 80, which gives a
higher flowrate. The Microgenus is the smallest combi case around and has a
keep-warm heat exchanger to eliminate the cold lag to taps that many combi's
have. It has all failsafe devices such as anti-scale, anti-frost, built-in
filler loop, time clock, etc.
The Wickes Combi 102 is a good boiler too. Made by Halstead
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com ).
had a Worcester Greenstar 28KW last 2 years (not a CDi with the leaky
exchanger). Been very good except a problem with the brains which Worcester
replaced free of charge under Manufacturers Guarentee.
Heats 11 rads in 2 zone setup with an excellent shower and has a small
internal reservoir for immediate hot water. It is quite large tho.
It also survived me draining down the heating, then switching it on by
accident, then over-repressurising it, then restarting it with the water
turned off. And every time I cocked up it gave me an error code which I
could look up in the manual (Never DIY with a bad hangover).
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