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When a boiler starts losing pressure, heating rooms unevenly or needing repeated repairs, it may be time to consider a replacement. RCB Heating & Cooling provides professional boiler installation in Thornton Heath, helping homeowners choose an appropriate system and making sure it’s installed, tested and explained properly.

We install complete boiler systems for new properties, extensions and major renovations. Our recommendation considers the building’s size, insulation, number of radiators and hot-water requirements, so the chosen boiler matches the way the property is used.

An older boiler may continue working while becoming less dependable and more expensive to maintain. Our boiler replacement service in Thornton Heath includes removing the existing appliance, installing a suitable modern unit and checking the heating and hot-water system.

A combi boiler provides heating and hot water through one compact appliance, without requiring a separate cylinder. This can make it useful in flats and houses where cupboard space is limited. We’ll confirm that the property’s water flow and pressure are suitable before recommending one.

Replacing an inefficient boiler can improve system performance and reduce unnecessary energy use. We can pair the new appliance with compatible controls, giving you more accurate management of heating times and temperatures.
Thornton Heath has a mixture of Victorian terraces, converted flats and later family homes. Available installation space can be limited in some properties, while older houses may have pipework that has been extended or modified several times.
We start with a survey of the existing system. This includes inspecting the boiler, accessible pipework, radiators and controls, as well as checking the household’s typical heating and hot-water demand.
We’ll then explain which options are suitable and whether any related work is genuinely necessary. Once the installation has been arranged, we protect the working area, remove the old boiler where agreed and keep disruption manageable. The new system is thoroughly tested before we show you how to use it.
Replacement isn’t always the only answer. We also provide boiler repair in Thornton Heath when an effective repair remains worthwhile. An annual boiler service in Thornton Heath can identify developing issues and help the appliance continue operating reliably.
RCB Heating & Cooling is a Which? Trusted Trader with more than 3,600 completed projects and excellent Google reviews from our customers.
Based in Sutton, we’re well placed to serve Thornton Heath and the wider Croydon area. Our experience includes older heating systems, compact installations in flats and family homes where extensions have increased the original heating demand.
We provide straightforward recommendations and clear quotations. Customers value our reliable communication, careful workmanship and the respect we show for their homes. We’ll never recommend a larger or more expensive boiler simply for the sake of it.
Areas We Cover
We work throughout Thornton Heath and surrounding neighbourhoods, including Broad Green, Norbury, Selhurst and South Norwood. Our engineers also cover Croydon, Crystal Palace, Mitcham, Streatham and other nearby parts of South London and Surrey.

We assess the current boiler, radiators, controls and your household’s requirements.

We explain the boiler type and output that best fit the property.

You receive a written quotation covering the agreed installation work.

We remove the existing appliance where required and install the new system with minimal disruption.

We test the heating and hot water, demonstrate the controls and answer your questions.

A straightforward replacement can often be finished within one day. A system conversion or boiler relocation may require more time.
That depends on the size of your property, number of bathrooms, water pressure and hot-water demand. We’ll assess these points before recommending a system.
Often, yes. However, a combi must be capable of meeting your household’s hot-water needs, particularly where more than one bathroom is in regular use.
Yes. We’ll assess the fault and explain whether repair or replacement offers the more sensible long-term option.
Usually, provided they’re in suitable condition and correctly sized. We’ll highlight any radiators or valves that need attention during the survey.
Regular servicing can identify signs of wear and operating problems. It may also be necessary to maintain the boiler manufacturer’s warranty.
If you’re considering a new or replacement boiler in Thornton Heath, contact RCB Heating & Cooling to arrange a survey. We’ll inspect your current system, discuss suitable options and provide a clear quotation. We also cover all surrounding areas and postcodes, including Thornton Heath, Broad Green, Norbury, Selhurst, South Norwood, Croydon, Crystal Palace, Mitcham and Streatham, across the CR0, CR4, CR7, SE19, SE25 and SW16 postcode areas.

£15
inc vat
For keeping warranty valid
£22.80
inc vat
For basic protection
£32.40
inc vat
For reliable family heating
£42
inc vat
For total coverage
£66
inc vat
Covering plumbing, drains and more
Features
Annual Boiler Service
Priority Service & Call Outs
Free of Charge Call Outs
1 Free Callout
Boiler and all internals
Labour Cost Discount
10%
100%
100%
100%
Replacement Part Discount
10%
20%
100%
100%
Loyalty Discount
10%
20%
30%
30%
Discount on new boiler installation**
10%
30%
50%
50%
Annual System Water Test
Annual System Anti Corrosion Treatment
Circulation pump
Thermostatic radiator valves
Timer/thermostat
Hot Water Cylinder
Radiators
Heating pipework
All gas supply pipes
System Powerflush (every 5 years)
Plumbing
Drains
Home Electrics
Optional Add-Ons
Unvented Cylinder Service
(Additional £6+VAT)
Gas Fire Service
(Additional £7.50+VAT)
Electrical Cover
(Additional £9+VAT)
/month + VAT
For keeping warranty valid/month + VAT
For basic protection/month + VAT
For reliable family heating/month + VAT
For total coverage/month + VAT
Covering plumbing, drains and moreready to upgrade your heating system?
Contact RCB Plumbing Ltd today to discuss your heat pump care plan.

RCB Plumbing serves local homes and businesses with honest advice, prompt response, and professional workmanship every time.
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