No central heating? Outdated system that's costing you a fortune? Extending your home and need heating in the new space? HeatBox designs and installs complete central heating systems across South London – from single radiator additions to full house installations with new boilers, pipework, and controls.
We cover Bexley, Greenwich, Lewisham, Bromley, Croydon, and all South London areas, plus extended coverage to Central London and Wandsworth. Over 15 years experience installing heating systems in every type of South London property. We handle everything – design, installation, Building Regulations compliance, and commissioning. All work backed by manufacturer warranties up to 12 years.
Whether you need a complete new system or upgrades to your existing setup, we handle it all:
No heating at all? We install complete systems from scratch – boiler, pipework, radiators, controls, everything. Common in South London properties that previously relied on electric heating, storage heaters, or old back boilers. We design the system around your property's specific needs.
Old boiler struggling to heat your home? Upgrading to a modern condensing boiler with proper controls can cut energy bills by 30% or more. We replace outdated systems with efficient modern setups, often improving heat distribution throughout your South London property.
Adding radiators to rooms without heating? Replacing old radiators with modern efficient ones? We install all types – standard panel radiators, column radiators, designer radiators, and towel rails. Properly sized for each room based on heat loss calculations.
New pipework for extensions, loft conversions, or replacing corroded old pipes. We use copper or plastic pipework depending on your property and requirements. Neat installation with minimal disruption, properly insulated where needed.
Modern controls make a massive difference to efficiency and comfort. We install room thermostats, programmable timers, TRVs (thermostatic radiator valves), smart controls like Hive and Nest, and zoned heating systems. Building Regulations require certain controls – we ensure compliance.
Converting from old gravity-fed systems to modern sealed systems? Removing hot water cylinders for combi boiler setups? Changing from electric to gas heating? We handle all system conversions, upgrading your South London property to modern standards.
Building an extension, converting a loft, or adding a conservatory? We extend your existing heating system or design separate zones for new spaces. Proper sizing ensures new areas heat effectively without compromising existing rooms.
We focus on South London rather than spreading thin across the entire capital. All our engineers are based locally – when you book an installation in Bexley or Greenwich, we're already in the area. We understand South London properties inside out.
Since establishing HeatBox, we've installed hundreds of central heating systems across Bexley, Greenwich, Lewisham, Bromley, Croydon, and surrounding areas. From Victorian terraces needing sensitive pipework routing to modern flats requiring compact solutions – we've done it all.
All our engineers are Gas Safe registered – the legal requirement to work on gas appliances in the UK. We're fully insured for complete peace of mind. Central heating installation requires proper certification – we handle all compliance.
As approved installers for Worcester Bosch and Vaillant, we offer extended warranties up to 12 years on new boilers. These are the UK's most trusted brands, and our approved status means you get the best warranty terms available.
We don't just fit equipment – we design your system properly. Heat loss calculations for each room, correct boiler sizing, optimal radiator placement, efficient pipework routes. Proper design means proper performance and lower running costs.
Central heating installations must comply with Building Regulations Part L. We're registered under Competent Person Schemes, meaning we self-certify our work and handle all necessary notifications. No hassle for you, complete compliance guaranteed.
Beyond manufacturer warranties on equipment, we guarantee our installation workmanship. If any issues arise from our installation within 12 months, we return and fix them at no cost.
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We install all major boiler brands, with specialist expertise in the UK's most trusted manufacturers:
Worcester Bosch is the UK's most popular and trusted boiler brand. As approved installers, we offer up to 12-year warranties on Worcester Bosch Greenstar boilers. Excellent reliability, great efficiency, and parts availability for decades. Our most recommended brand for South London installations.
Vaillant ecoTEC boilers offer German engineering and excellent build quality. As approved installers, we provide extended warranties up to 10 years. Popular choice for properties needing compact boilers with high output. Strong reputation across South London.
Ideal boilers offer excellent value with solid performance. Logic and Vogue ranges suit various property sizes and budgets. Good warranty options and reliable UK-based support. Popular choice for landlords and budget-conscious homeowners.
Baxi boilers including Duo-Tec and 800 series provide reliable performance at competitive prices. British brand with strong parts availability. Good option for straightforward installations.
Viessmann offers premium German-engineered boilers with excellent efficiency ratings. Higher initial cost but exceptional long-term reliability. Popular in higher-end South London properties.
We also install Glow-worm, Potterton, Main, Alpha, and other brands based on your requirements and budget. We'll recommend the best option for your specific situation.
Don't worry – our engineers can identify and repair any boiler. Call us for expert diagnosis and repair.
What actually happens when you call for emergency boiler repair—from first contact to 12-month guarantee.
We visit your South London property to assess requirements. We check existing systems, measure rooms, note pipework routes, and discuss your heating needs. This survey is free and without obligation.
Based on the survey, we design your system. Heat loss calculations determine boiler size and radiator outputs. We plan pipework routes minimising disruption. Control options are specified. You receive a detailed proposal.
You receive a comprehensive written quote covering all work, materials, and timescales. The price is fixed – no surprises during installation. We explain everything and answer questions before you decide.
Once you approve the quote, we schedule installation at a time that suits you. Most full systems take 2-4 days depending on complexity. We confirm dates and explain what to expect.
Our Gas Safe engineers complete all work – boiler fitting, pipework, radiators, controls. We work cleanly and tidily, protecting your floors and furniture. We keep disruption to minimum while ensuring quality installation.
After installation, we commission the system properly. This includes filling, pressurising, bleeding radiators, testing all controls, checking gas rates, and verifying safe operation. Commissioning is essential for warranty validity.
We issue Building Regulations compliance certificates under Competent Person Schemes. This is lodged with your local council automatically. You receive documentation for your records and future property sales.
We demonstrate your new system – how to use controls, adjust temperatures, repressurise if needed. You receive all documentation including warranties, certificates, and user guides. We're available for follow-up questions.
Central heating costs vary significantly based on system size and complexity. Here's a guide:
Several factors influence the final cost of gas leak repairs:
Victorian and Edwardian houses require careful pipework routing around original features. Flats may have limited space for boiler placement. New builds usually have provisions making installation simpler. We assess complexity during the free survey.
Replacing an existing system is simpler than installing from scratch. Converting from gravity-fed to sealed systems adds complexity. Removing old pipework and radiators adds time. We survey your existing setup thoroughly.
Surface-mounted pipework is faster and cheaper. Concealed pipework under floors or in walls takes longer but looks neater. First-fix pipework during building work is most efficient. We discuss routing options and implications.
Keeping the boiler in its current location simplifies replacement. Moving the boiler requires additional pipework and potentially flue alterations. We'll advise on optimal boiler positioning for your South London property.
Single-zone systems are simplest. Multi-zone systems (upstairs/downstairs, extension) require additional controls and pipework. Zoning improves comfort and efficiency but adds installation complexity.
South London's diverse property types each present specific gas leak considerations:
Period properties common across Greenwich, Blackheath, Dulwich, and Forest Hill require sensitive installation approaches. We route pipework to minimise visual impact, work around original features, and ensure adequate ventilation for boilers. Cast iron radiators can be retained or replaced. Conservation area restrictions may affect external flue positions.
Predominant across Bexley, Bromley, and Streatham. Gas installations from this era may have been modified multiple times. Mixed pipework materials and aged joints are common leak sources. Generally accessible pipework makes repairs straightforward.
South London flats require compact solutions. Combi boilers are standard due to space constraints. Wall-hung boilers in kitchen cupboards are common. We ensure adequate ventilation in enclosed spaces. High-rise properties may need specific flue solutions.
Greenwich Peninsula, Woolwich Arsenal, and Canada Water properties often have builders' specifications we must work within. Warranty requirements from developers may influence choices. We coordinate with building management where necessary.
Loft conversions, rear extensions, and side returns across South London need integrated heating solutions. We can extend existing systems or create separate zones. Proper sizing ensures new spaces heat effectively without compromising existing areas.
Thames Water serves South London with high mineral content (250-320mg/l calcium carbonate) – significantly harder than many other areas.
New systems in hard water areas need protection from day one. Limescale damages boilers, reduces efficiency, and shortens lifespan. Prevention during installation is far better than dealing with problems later.
We include magnetic filters (like MagnaClean) as standard on new installations. System inhibitor is added during commissioning. We recommend scale reducers for the worst affected South London areas. These measures protect your investment and maintain efficiency long-term.
Legal requirements every engineer must follow and why they exist
Central heating installations must comply with Building Regulations Part L (Conservation of Fuel and Power). New boilers must meet minimum efficiency standards (currently 92% ErP rating). Heating controls including room thermostats, programmers, and TRVs are mandatory.
All gas work must be completed by Gas Safe registered engineers. This includes boiler installation, pipework connections, and commissioning. Our Gas Safe registration covers all domestic central heating work.
We're registered under Competent Person Schemes, allowing us to self-certify Building Regulations compliance. This means faster completion without waiting for Building Control inspections. Certificates are automatically lodged with your local council.
Most central heating installations don't require planning permission. However, external flues in conservation areas or on listed buildings may need approval. We advise on any planning considerations for your South London property.
All our engineers are Gas Safe registered with £5M public liability insurance. We comply with all Building Regulations, provide landlord certificates, and maintain complete legal compliance for every job across London.
HeatBox provides central heating installation with specialist focus on South and South East London:
South & South East London Specialists
Not all heating problems are equal—here's how to determine if you need emergency callout
Not sure if you have an emergency? Call us and we'll help you assess urgency and prioritise accordingly across our London coverage areas.
What to expect when we repair your boiler
Clear access to areas where work will happen – boiler location, radiator positions, pipework routes. Move furniture away from walls where radiators will be fitted. We'll advise specifically based on your installation plan.
Installation typically takes 2-4 days for full systems, 1 day for boiler replacements. We work 8am-5pm normally. Expect some disruption – lifting floorboards, drilling walls, temporary loss of heating/hot water. We minimise mess and clean up daily.
Your new system is commissioned and ready to use. We demonstrate controls and answer questions. You receive all documentation – warranties, certificates, user guides. We're available for follow-up support if needed.
Run your heating before you really need it – test everything works. Bleed radiators if you notice cold spots. Check pressure monthly (typically 1-1.5 bar when cold). Call us if anything seems wrong – better to check early than suffer in cold weather.
Customers who installed central heating also used:
Need just a boiler replacement without full system work? We install all major brands with warranties up to 12 years.
Annual servicing keeps your new system running efficiently and maintains warranty validity. From £90
Existing system full of sludge? Powerflush before or after installation ensures optimal performance. £500 Zone 1.
Want invisible heating for extensions or renovations? We install wet underfloor heating systems throughout South London.
Upgrade your heating controls with Hive, Nest, or other smart systems for better efficiency and convenience
Over 15 years serving London with transparent pricing, specialist knowledge, and genuine emergency response. No corporate markup, just honest local service.
Full system installation ranges from £4,000-£6,000 for small flats to £9,000-£15,000 for large houses. Boiler replacements cost £2,500-£3,500. Exact pricing depends on property size, system complexity, and equipment choices. We provide free surveys and fixed quotes.
Boiler replacement typically takes 1 day. Full system installation in an average 3-bed house takes 2-4 days. Complex installations or large properties may take longer. We confirm timescales in your quote.
No – you can stay in your property. There will be disruption and temporary loss of heating/hot water. We work room by room where possible. Most customers find it manageable, especially in warmer months.
Boiler manufacturer warranties range from 5-12 years depending on brand and model. Worcester Bosch and Vaillant offer up to 12 years through our approved installer status. We guarantee our workmanship for 12 months.
Yes – we're registered under Competent Person Schemes and self-certify all installations. Building Regulations certificates are lodged with your local council automatically. You receive documentation for your records.
Yes – we extend existing systems or create separate zones for extensions, loft conversions, and conservatories. We'll survey your property and recommend the best approach for your South London home.
Combi boilers suit most South London flats and smaller houses – instant hot water, no cylinder needed. System boilers suit larger properties with multiple bathrooms needing hot water simultaneously. We'll recommend based on your specific needs.
Yes – we offer finance options for central heating installations. Spread the cost with manageable monthly payments. Ask during your survey for details and eligibility.
Ready for reliable, efficient central heating? Book your free survey and get a fixed-price quote for your South London property.
Serving Bexley, Greenwich, Lewisham, Bromley, Croydon & All South London
Available 24/7 | Gas Safe Registered | Fully Insured
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