your boiler replacement guide
your boiler replacement guide
Replacing your boiler can raise a lot of questions. Our guides are here to give you straightforward answers about combi boiler replacement — without making you learn a load of boiler jargon first.
From cost and sizing to installation and replacing an existing system with a combi, start with the question you actually need answered.
Start with the questions that matter
Can I replace my existing boiler with a combi?
Find out what needs to be considered when replacing an existing system, regular or back boiler with a combi, including hot-water demand, incoming water supply and installation requirements.
How much does a combi boiler replacement cost?
Understand the factors behind the price, including the boiler, output, installation complexity, pipework, location, controls and conversion work.
What size combi boiler do I need?
Understand why boiler output matters and why the right size depends on the requirements of your home rather than simply choosing the biggest model.
Does water pressure affect a combi boiler?
Learn why incoming water supply can matter when deciding whether a combi is suitable for your household’s hot-water demand.
Is a combi suitable for a home with multiple bathrooms?
Understand the practical question to ask: how much hot water does your household need at the same time, and can the property’s supply support it?
How long does combi boiler installation take?
See what can affect installation time, from a straightforward replacement to changes in boiler location or conversion work.
Should I repair or replace my old boiler?
Look at the factors that can make replacement worth considering, including age, repeated repairs, reliability and the availability of parts.
Can I move my combi boiler?
Understand why moving a boiler can change the work involved and why the proposed new location needs to be considered before a price is confirmed.
Do I need a new thermostat?
Understand the role of controls in a boiler replacement and what may be included or offered as part of the installation.
Which combi boiler brands are available?
Where CentralHeating.com sells specific brands, guides should focus on the models actually available and the factors that matter: output, warranty, controls, installation requirements and suitability.
our guide approach
Every guide should answer a genuine homeowner question first. We won’t create pages simply to capture slightly different keyword variations.
Where a guide naturally leads to a replacement decision, we’ll make the next step clear: check your suitability, see your likely price, or speak to a real person.
Still not sure?
You don’t need to work everything out from a guide. If you’re considering replacing your boiler, tell us about your home and existing boiler and we’ll help you understand the next step.