Boiler installation
New boilers and full replacements — combi, system and regular — with fixed-price quotes and tidy, certified fitting.
Learn more about boiler installationGas Safe registered heating engineers
Boiler installation, repair & servicing across London
Nexa Heating keeps your home warm with reliable boiler installations, fast repairs and annual servicing — carried out by qualified local engineers in Barnet, Enfield, Haringey, Camden, Islington, Hackney, Waltham Forest, Bromley, Ealing, Redbridge and Harrow.
- Fixed-price quotes
- Up to 10-year guarantees
- Honest, no-pressure advice
What we do
Complete home heating services
From a brand-new boiler to a quick fix or a yearly service, our Gas Safe engineers look after every part of your central heating.
Boiler repair
Fast fault-finding for no heating, no hot water, leaks, pressure loss and error codes, with honest advice on repair vs replace.
Learn more about boiler repairBoiler service
Annual safety and performance checks that protect your warranty and keep your boiler running efficiently.
Learn more about boiler serviceMagnaCleanse power flush
Deep-cleans sludge, rust and debris from your system for warmer radiators and better circulation.
Learn more about magnacleanse power flushUnderfloor heating
Warm-water underfloor systems for renovations, extensions and new builds — even heat and freed-up wall space.
Learn more about underfloor heatingNot sure what you need?
Speak to a heating engineer for straight-talking advice — no obligation, no pressure.
Speak to an engineer
Why Nexa Heating
Heating you can rely on, from people you can trust
We’re a local team of qualified heating engineers who believe in doing the job properly and explaining it plainly. No jargon, no surprises — just warm homes and fair prices.
Gas Safe registered
Every engineer is qualified and Gas Safe registered for legal, safe gas work.
Fixed-price quotes
Clear written quotes with no hidden extras added later.
Prompt, reliable
We turn up when we say we will and keep you updated throughout.
Plain-English advice
No jargon and no pressure — just honest recommendations.
Guaranteed work
Manufacturer-backed warranties and workmanship you can count on.
Local team
Based nearby and familiar with homes across the boroughs we cover.
Areas we cover
Local heating engineers near you
Proudly serving homeowners across eleven London boroughs, from Enfield to Bromley.
BarnetBoiler & heating servicesEnfieldBoiler & heating servicesHaringeyBoiler & heating servicesCamdenBoiler & heating servicesIslingtonBoiler & heating servicesHackneyBoiler & heating servicesWaltham ForestBoiler & heating servicesBromleyBoiler & heating servicesEalingBoiler & heating servicesRedbridgeBoiler & heating servicesHarrowBoiler & heating services
Boiler brands
Quality boilers from trusted manufacturers
We install and service leading boiler brands, and we’ll help you choose the right one for your home and budget.
Worcester Bosch
A widely trusted name known for dependable combi and system boilers.
Strong reputation for reliability & support
Vaillant
German-engineered boilers popular for quiet running and efficiency.
Great all-round choice for most homes
Viessmann
Premium boilers with strong efficiency credentials and long warranties.
Efficiency-focused, premium option
Intergas
Simple, low-maintenance designs with fewer internal parts.
Fewer components, easy servicing
How it works
A simple, transparent installation process
From your first call to aftercare, we keep every step clear and well-managed — so you always know what’s happening next.
- 1
Initial enquiry
Tell us what you need by phone or online.
- 2
Home survey
We assess your home, heating and hot water needs.
- 3
Recommendation
We suggest the right boiler and setup for you.
- 4
Fixed quotation
A clear written price with no hidden extras.
- 5
Installation day
We remove the old boiler and fit the new one.
- 6
System flush
We clean the system where needed for best performance.
- 7
Testing & commissioning
Full checks to confirm safe, correct operation.
- 8
Handover & aftercare
We show you the controls and advise on servicing.
Efficiency ratings
A more efficient boiler, a warmer home
Older boilers can waste a large share of the energy they burn. Modern A-rated condensing boilers recover heat that would otherwise be lost, helping you get more warmth from every unit of gas. Correct sizing, good controls and a well-balanced system all play their part.
- Modern condensing boilers recover heat that older units waste up the flue.
- Correctly sizing the boiler to your home avoids wasted energy.
- Good controls, thermostats and radiator valves help you heat only what you need.
- Regular servicing keeps a boiler running at its best year after year.
Energy efficiency scale
Modern condensing boilers
Older, less efficient units
Ageing boilers due for upgrade
Illustrative only. Actual running costs depend on your home, usage and energy prices — we’ll give you a realistic picture during your survey.
FAQs
Common boiler & heating questions
How much does a new boiler cost?
It depends on the boiler type, brand and your home’s setup. After a quick survey we provide a fixed written quote with no obligation, so you know the full price before deciding.
Do you offer emergency boiler repairs?
Yes. We prioritise no-heating and no-hot-water calls across Barnet, Enfield, Haringey, Camden, Islington, Hackney, Waltham Forest, Bromley, Ealing, Redbridge and Harrow and aim to get an engineer to you as soon as we can — call us for the earliest realistic slot. If you smell gas, call the National Gas Emergency Service on 0800 111 999 first.
How often should I service my boiler?
Once a year. An annual service by a Gas Safe registered engineer keeps your boiler safe and efficient, catches small faults early and is usually a condition of the manufacturer’s warranty.
What is a MagnaCleanse / power flush?
Both clean sludge, rust and debris out of your central heating. MagnaCleanse is Adey’s magnetic system clean that uses powerful magnets and a cleaning chemical to remove iron oxide, usually with less disruption than a traditional power flush. Either can help cold radiators heat properly again.
Which boiler brands do you install?
We install Worcester Bosch, Vaillant, Viessmann and Intergas boilers, and we’ll help you choose the right one for your home’s size, hot water demand and budget.
Which areas do you cover?
We cover Barnet, Enfield, Haringey, Camden, Islington, Hackney, Waltham Forest, Bromley, Ealing, Redbridge and Harrow, plus nearby postcodes. If you’re not sure whether we cover your street, send us your postcode and we’ll confirm.
Have a different question? Speak to a heating engineer →
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Get your free, no-obligation quote
Tell us what you need and we’ll get back to you quickly with honest advice and clear pricing.
- Call us07709 247215
- Gas Safe registeredAll gas work by registered engineers
- Opening hoursMon–Sat, 8am–8pm
No heating or hot water?
Don’t sit in the cold — talk to a Nexa engineer today.