Boiler Installation Clapham

New boiler supply and installation across South London and Surrey. Combi, system, and heat-only boilers from leading manufacturers. Gas Safe registered, fixed price before work starts.

Postcodes covered
SW4SW11SW9

New boiler installation across South London — supply and fit

Replacing an old, inefficient boiler is one of the most effective improvements you can make to a South London home. R.W. Miller installs combi boilers, system boilers, and heat-only boilers across SW and SE postcodes — covering Wandsworth, Clapham, Streatham, Lewisham, Greenwich, Bromley and surrounding areas. Reion is Gas Safe registered (919881) and works with leading manufacturers including Vaillant, Worcester Bosch, and Ideal.

A new boiler installation is always priced as a fixed quote before any work begins. The quote covers supply, installation, commissioning, and disposal of your old unit. No day-rate surprises and no hidden costs. Most installations are completed in a single day, leaving you with a fully working system and all Gas Safe documentation in hand.

If your current boiler is over ten years old, breaking down regularly, or pushing energy bills higher than they should be, call 07375 813996 for a no-obligation quote. Reion will assess your current system and recommend the right solution for your property and budget — not the most expensive one.

Signs it is time to replace your boiler

Boiler is over 12 years old Most boilers have a working life of 10–15 years — beyond this, repair costs and falling efficiency make replacement the better option.
Frequent breakdowns If you have called an engineer more than twice in the past two years, the ongoing repair cost is approaching the price of a new installation.
Rising energy bills Older boilers lose efficiency as components wear — a modern A-rated boiler can significantly reduce your annual gas consumption.
Uneven heating across the house If some rooms heat properly while others stay cold, your boiler may no longer have the capacity to serve the full property efficiently.
Parts are no longer available For boilers over 15 years old, replacement parts become difficult to source — a problem that only gets worse over time.
Yellow or orange flame instead of blue A discoloured flame is a sign of incomplete combustion and a potential carbon monoxide risk — the boiler should be replaced immediately.

How a new boiler installation works

01

Free survey and fixed quote

Reion visits your property, assesses your current heating system, and recommends the right boiler type for your home. A fixed price is provided before you commit to anything.

02

Boiler selection

We supply boilers from Vaillant, Worcester Bosch, Ideal, and other trusted manufacturers. We advise on combi, system, or heat-only based on your hot water demand and available space.

03

Installation day

Most installations are completed in a single day. We remove and dispose of your old boiler, fit and commission the new one, and test the full heating system before leaving.

04

Documentation and handover

The new boiler is registered with the manufacturer and all Gas Safe certificates are issued. You receive full warranty information and a walk-through of the new controls.

Frequently asked questions

How much does a new boiler installation cost in South London?
The cost depends on the boiler type, brand, and complexity of the installation. A straightforward like-for-like combi boiler replacement typically costs between £1,500 and £2,800 supply and fitted. Reion provides a fixed price after a site visit — call 07375 813996 to arrange a free no-obligation quote.
How long does a boiler installation take?
Most boiler installations are completed within a single day. A straightforward like-for-like replacement in the same location typically takes four to six hours. More complex work — such as moving the boiler or upgrading pipework — may take longer, and Reion will advise you on timescales in advance.
What type of boiler is best for my South London home?
For most South London flats and terraced houses, a combi boiler is the most practical choice as it provides hot water on demand without a separate cylinder or tank. System boilers suit larger properties with multiple bathrooms. Reion will assess your property and hot water demand and recommend the right type.
Does a new boiler come with a warranty?
Yes. All boilers we install come with the manufacturer's warranty — typically five to ten years depending on the brand and model. The boiler is registered with the manufacturer on the day of installation. Extended warranty options are available on most brands and Reion can advise on these.
Can I get a free boiler replacement in South London?
Free boiler replacements are available to qualifying households through the government's ECO4 scheme, which is means-tested. Eligibility depends on benefit status and property energy rating. Reion can advise whether you may qualify, though scheme availability changes. For standard private installations, we provide the most competitive fixed price we can.
Boiler Installation across South London
Bromley Greenwich Lambeth Lewisham Southwark Surrey Wandsworth