Condenser vs Combi

[Mavrick]

I've recently purchased a house with no central heating system and have been
advised to consider installing a condenser boiler. I spoken to a few friend
but they warn that they are not very reliable. I can't seem to find any
info other than efficiency tables.

The house in question is detached, built in 1880, 4 bedrooms, 2 lounges, and
a kitchen/utility rooms.

A plumber has said that a floor mounted boiler would be better because of
vibration and that each radiator needs oversized by about 10%.

I would appreciate as much advice about this as possible as I have not got a
clue, I don't even know where the thermostat need to be :)

MTIA....... Nigel

[mw.brackenbury]

Mavrick <cot...@btinternet.com> wrote in message
news:9mmh72$qas$2...@uranium.btinternet.com...

Nigel
There is no reason for a condensing boiler to be unreliable, after all it
only has an extra heat exchanger.
I installed my condensing boiler last year, all is ok.
Combi boilers are complicated and as well as not giving a good flow of hot
water, are unreliable.
All fan assisted boilers have the potential for the fan motor to burn out,
but "quality" makes are much better in this respect as they use AC induction
motors to blow the cold airflow.

I was advised against a combi-condensing boiler by two suppliers on
reliability grounds, also they wont be condensing on short hot water cycles.

The advantage of combi is no tanks, but with poor hot flow.

If starting from scratch I would go for a condensing boiler with sealed
system, mains hot water cylinder and solar water heating...no cold water
tanks and a simple system.

Will

[George Thomson]

Hi Nigel

I have had a wall mounted condensing combi boiler that has worked perfectly
for 6 years, serviced when "I" think it has needed it and so far only had to
fit a pump.

Maaay Beee I shouldn't have said that??????????

George

"Mavrick" <cot...@btinternet.com> wrote in message
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[gerant]

Just out of interest....

What reason did the plumber give for oversizing the radiators by 10%? If
proper heat loss calculations are made you should arrive at a more or less
exact figure for radiator sizes.

gerant

[Andy Jackson3]

Just a quick point about the oversizing referred to. This is probably to
allow for the greater thermal inertia in what are probably thick stone
walls. They take longer to heat up from cold than brick but also stay warm
longer. You will find your whole house stays at a very stable temperature
once the system is up and running.
Andy
"George Thomson" <gtsc...@cableinet.co.uk> wrote in message
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