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Boiler types
New boiler?

New boiler cost?

Condensing boilers
Combi boilers
Boiler servicing
Expected life of a boiler

What is "SEDBUK"?
Boiler descaling

Asbestos risk in boilers

Concealed flue duct risk

Boiler Reviews


Central heating:

How does it work?
Pipework layouts
Open-vented or sealed?
Thermostatic valves
Warm air heating

Unusual boilers:
PulsaCoil, BoilerMate
  & other thermal stores
Electric 'flow boilers'

Range & Potterton PowerMax

Ideal iStor
GEC Nightstor


Hot water:
Four types of HW system




Avoiding the rogues
Plumbers not turning up
Building Regulations
Common faults
Dangerous appliances
Mains hot water
DIY gas work
The Gas Regulations
Plumber or Heating Engineer?
Boilers in lofts




Useful links
My other websites



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Do I still fit  bathrooms?

My old bathrooms website is here. Beware, it is an old site and I don't maintain it. Some of the info will be out of date.

























Combi boilers

Do I do combi boilers?

Yes. I repair them and have even installed them occasionally in the distant past, but I don't particularly like them!

Firstly, an overview of what a combi boiler actually is... 

A combi boiler combines in one single appliance the functions of an ordinary boiler, the hot water cylinder and cold tanks from the loft. It heats the house via radiators in the normal way but also provides hot water to the taps by passing fresh water through the boiler and heating it directly on its way to the tap. This removes the need for both the hot water cylinder and the cold water tanks, so combis let you get rid of the tanks in the loft and airing cupboard and regain the space. This can be very useful in a small home or flat, but combis also have quite a few drawbacks.

A lot of combis have been sold to people who were unaware of their limitations until they owned one (although there are a lot of satisfied combi users too), so if you ask me for a combi I'll want to be sure it is right for your circumstances and you understand the potential drawbacks before I fit it. Here are a few of them... combi problems 

Once you have read and digested the potential combi problems, come back here and read about how to pick your way through the bewildering range of combis on the market, what the differences are and how to choose the right one for you. 

Combi options...

There are several different features to consider, as follows:

  • Heat output
  • With/without secondary heat exchanger
  • Condensing or not
  • With/without stored hot water reservoir

Read more about them here


Page first created 16th January 2004
Last updated 5th November 2007

Copyright 2004-2007 Michael Bryant

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