We repair boilers, thus we know what might cause boilers to
stop working, so on our boiler installs we tend to avoid
any weakness to prolong boiler life expectation.
As we said in the repairs section that boiler installation is easier than boiler
repairs, we also install boilers if it is necessary. We have a tracking
record on boiler installation, in 2015 we installed over
100 boilers, ie, average two installs each week, and more
than half of the boilers we installed are from
Being competent and honest on boiler repairs has lead
us for more and more boiler installs / replacements.
We only install decent boilers!
In 2015 we were granted
as Vaillant masterTEC elite installer - The very top
grade of Vaillant accredited installers. Vaillant give
the boilers we installed one extra year warranty.
It is assessed by the loyalty, number of boilers
installed, and rate for warranty call outs.
So we must have done something right with our boiler
Vaillant ecoTEC plus (825, 832, and
838 combi boilers, 615, 618, 624 and 637 system)
boiler with 8 year warranty
Vaillant ecoTEC 24, 28 and 30 pro with
Gas Safe competency:
To install a boiler the installer has to be on Gas Safe
Register. Unfortunately in our repair practice we have
seen so many cases where boiler installations are not up
to standards leading to boiler's breakdown and even
to un-safe situations. We are Gas Safe Registered, actually
we are not only registered for domestic boilers, also
registered for commercial boilers bigger than 70kW. We
are very competent
on boiler installation.
We are also NICEIC registered electricians, Approved
Contractor, from domestic up to commercial and industrial scopes. Boiler
installations are also involved in electrical connection and controls, ie,
boiler main's spurs, programmers, room thermostats,
external pumps and control valves etc. We are in a unique
position to fulfill the Part P requirements - the
domestic electrical safety regulation in dwellings. We
are probably the only firm in
St Albans to have both gas and electrical competent
Beyond economic repairs:
Herts Boilers are specialised in boiler repairs, but sometimes we
consider a boiler beyond economic repair if the cost of
the repair is unrealistically high compared to the life
expectancy of the boiler. As a rule of thumb £150 should
give the boiler at least another year of life.
High efficiency boilers
From 2005 all new boilers installed in the UK have to be
condensing type, ie, high efficiency at around 90%, or called A
rated, compared with casting iron type boilers which is
only around 55% in efficiency. A high efficiency boiler
will save you gas consumption in the long run.
An Energy Saving Case
Study – By Boiler Replacement
Energy Efficiency Database
Correct sized boilers:
To select a new boiler it has to be correctly sized, not
under and not over. We will calculate all the radiator
heat outputs along with hot water requirements to choose
a correct sized boiler for the purpose. Rule of thumb,
It is 100W for per square meter (or 40W per cubic
meter), for a 100 square meter house, the heating side
should be given 10kW.
Should a new boiler be always a combi?
Combi boiler is a great invention but it is not always
right to go for a combi. We will give you unbiased
suggestion for a new boiler with heating and hot water
We also install system boilers for Megaflow systems and
heat only boilers for vented systems.
If a boiler is installed by a Gas Safe Registered
engineer up to the standards, it will normally be under
manufacturer warranty for a few years. Herts Boilers is
an approved installer for the following boiler
manufacturers (at the time of writing on Oct 2016):
Vaillant - 6
years and 8 years
Glow worm - 5
years and 7 years
Viessmann - 5
Baxi / Potterton / Main
- from 2 years to 10 years
Ideal - from 2
years to 10 years
Once we registered an installation with the
manufacturer, they will give the client up to 10 year labour
and part warranty.
Pump over run for heat only boiler replacement:
over run is to run the circulation pump for a couple of
more minutes after the boiler stops combustion to avoid
the latent heat in the heat exchanger to cause a boiler over heat
Some of old boilers with cast iron heat exchangers don't
need pump over run, but most of modern boilers do need
pump over run. When a heat only boiler is to be
replaced, the installer has to consider this issue. You
can't pick up Vaillant or Worcester boilers, two well
known makes in UK market, for a like to
like replacements to old boilers which haven't got pump
over run in the past, or you have to run a new cable
from the boiler location to the airing cupboard where
the pump is located, and make a new auto bypass there. There
are only two models, Baxi EcoBlue and Viessmann Vitodens,
which are compatible for
non pump over run models.