Central Heating Clapham

Central heating installation, repair, and maintenance across South London and Surrey. Gas Safe registered engineer covering all heating systems — from radiator work to full system installations.

Postcodes covered
SW4SW11SW9

Central heating installation and repair across South London

Whether you need a full central heating installation, a system power flush, a new radiator, or a repair to an existing setup, R.W. Miller Plumbing & Heating covers the full range of central heating work across South London. We work across SW and SE postcodes — Wandsworth, Clapham, Streatham, Brixton, Lewisham, Greenwich, Bromley and surrounding areas. Reion is Gas Safe registered (919881) with experience across all types of wet central heating systems.

All central heating work is priced transparently. For repairs and installations, a fixed price is agreed before work begins. For more complex projects — such as installing central heating in a property that currently has none — a full site survey is carried out and a detailed quote provided with no obligation.

Cold radiators, uneven heating, noisy pipes, or a system that takes too long to warm up are all signs your central heating needs attention. Call 07375 813996 to discuss the problem and arrange a visit.

Signs your central heating needs attention

Cold spots on radiators Cold patches — usually at the top of a radiator — indicate trapped air in the system, which requires bleeding to restore even heat distribution.
Some radiators not heating at all If certain radiators stay cold while others heat normally, the system may need balancing or there may be a blockage in the affected circuit.
Noisy pipes or radiators Banging, clanking, or gurgling sounds in pipes or radiators typically indicate air, limescale build-up, or pump pressure issues.
System takes too long to warm up A central heating system that takes significantly longer to reach temperature than it used to may have sludge build-up, a failing pump, or a system imbalance.
Radiators cold at bottom, warm at top This is the opposite of air — it usually indicates sludge build-up at the base of the radiator, which requires a power flush to clear.
Visible corrosion or leaking joints Rust staining near radiator valves, pipe joints, or the boiler itself indicates water leakage that should be investigated and repaired promptly.

Our approach to central heating work

01

Diagnosis and assessment

We start with a thorough assessment of your heating system — identifying whether the issue is a blocked circuit, an imbalance, a failing component, or something else entirely.

02

Fixed-price quote

Once the problem is identified, a fixed price is agreed before any work begins. For new installations, a detailed quote is provided following a full site survey.

03

Installation or repair

Work is carried out efficiently with minimal disruption. We cover radiator installation, system balancing, power flushing, pump replacement, valve work, and full system installations.

04

System test and commissioning

On completion, the full heating system is tested and balanced. For new installations, all pipework is pressure tested and the boiler is commissioned correctly before handover.

Frequently asked questions

How much does central heating installation cost in South London?
The cost of installing central heating depends on the size of the property, the number of radiators required, and the complexity of the pipework routing. Reion provides a detailed fixed price after a site survey — call 07375 813996 to arrange a visit. As a guide, a typical South London terraced house installation ranges from £3,500 to £7,000 including boiler.
How long does it take to install central heating in a property?
A full central heating installation in a typical South London terraced or semi-detached property takes between three and five days. This includes running all pipework, fitting radiators, installing the boiler, and commissioning the complete system. Properties with particularly difficult access or more complex pipework layouts may take longer.
What is a power flush and does my system need one?
A power flush is a deep clean of your central heating system using a high-flow pump and specialist chemicals to remove sludge, rust, and scale that accumulates over time. Signs your system may need flushing include cold radiator bottoms, noisy pipes, reduced efficiency, and a boiler that works hard without heating the house effectively. Reion can advise whether a flush is the right solution for your system.
Can you add radiators to an existing heating system?
Yes. Adding radiators to an existing central heating system is a straightforward task in most South London properties. Reion will assess whether your existing boiler and pump have sufficient capacity for the additional load, and fit the new radiator with appropriate valves and a thermostatic radiator valve. The system is then balanced to ensure even heat distribution.
My heating is on but the house is cold — what could be wrong?
There are several possible causes: blocked or sludge-filled radiators, an imbalanced system where water bypasses some radiators, a failing circulating pump, a thermostat issue, or a boiler that is running but not reaching the required output temperature. Call 07375 813996 and Reion will diagnose the problem on-site — most causes can be identified and resolved in a single visit.
Central Heating across South London
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