020 8051 2124Book online
020 8051 2124Book online

Gas Safe 657972 · West & North West London

New Boiler Installation & Replacement in West London

A-rated boilers fully fitted from £2,499 with up to a 10-year warranty.

We take the guesswork out of replacing your boiler. Every installation includes a free home survey, a fixed written quote, a free wireless digital thermostat, Adey magnetic system filter, chemical powerflush, and your Year 1 annual service completely free. Fitted cleanly in one day by local Gas Safe engineers.

Get a new boiler quote020 8051 2124

Combi to combi swap packages

Installation package starting from £2,499

Every installation includes the bundle below as standard. Your final price depends on your current boiler type, flue position, hot water setup and whether any pipework or system cleaning is needed — the free survey settles all of it first.

  • FREE Wireless Digital Thermostat included
  • FREE Year 1 Annual Boiler Service worth £120, protects your warranty
  • Up to 10-year manufacturer warranty
  • Chemical flush & magnetic system filter
  • Old boiler removal & disposal
Book a free survey

WHAT’S INCLUDED

Worcester Bosch, Vaillant & Baxi Boiler Installations in West London

We don’t just swap the unit on the wall and leave. Every Happy Heating installation is a complete heating upgrade designed to protect your new boiler for the long term. From chemical flushing to clear old radiator sludge and fitting magnetic filters to setting up your smart controls and registering your 10-year warranty — every essential step is included in your fixed quote.

01 / APPLIANCE & CONTROLS

A-Rated Boiler & Free Wireless Controls

A high-efficiency condensing boiler correctly sized for your home, paired with a free wireless digital thermostat to keep your gas bills low.

  • A-rated Worcester Bosch, Vaillant, Ideal or Baxi
  • Free Wireless Digital Thermostat supplied & set up
  • Gas Safe notification & compliance certificate issued

02 / SYSTEM PROTECTION

Chemical Flush & Magnetic Filtration

We never connect a brand new boiler to dirty radiators. We clean out existing magnetite sludge and install dedicated filtration to protect your heat exchanger.

  • Full chemical flush to remove black iron oxide sludge
  • Adey MagnaClean magnetic system filter fitted
  • Premium inhibitor added to prevent future internal rust

03 / HANDOVER & ONGOING CARE

Old Unit Recycled & 10-Year Warranty

We protect your home, leave the work area spotless, register your manufacturer warranty on the day, and look after you into the future.

  • Old boiler and packaging removed from site free of charge
  • Free Year 1 annual boiler service included (worth £120)
  • Gas Safe compliance certificate issued on completion

CHOOSING THE RIGHT BOILER

Combi, System or Regular Boiler: Choosing the Right Setup for Your Home

There is no one-size-fits-all boiler. The best replacement depends on your property layout, incoming mains water pressure, number of bathrooms, and how much hot water your household uses at the same time. During your free survey, we check your current pipework and recommend the most practical, cost-effective option for your lifestyle.

Combi Boiler

Heating and hot water from one unit, with no cylinder or tank taking up space. Suits most flats and smaller homes on good mains pressure.

A-rated efficiencyAsk about this

System boiler

Works with a hot water cylinder to serve higher hot water demand: the usual answer for a family home with more than one bathroom.

High hot water demandAsk about this

Regular / Heat-Only Boiler

Connects directly to your existing cold-water loft tank and airing cupboard cylinder. The most sensible, cost-effective replacement when you want to avoid disruptive pipework changes.

Direct swap for older systemsAsk about this

SIMPLE, STRESS-FREE BOOKING

How booking your local engineer works

Whether you need an urgent boiler repair, an annual service, or a quote for a new installation, getting an expert Gas Safe engineer to your door is straightforward. No call centres, no waiting in all day, and no surprise charges — just clear arrival windows, fixed upfront pricing, and payment only once the work is completed and fully tested.

We check your home

We assess your boiler, radiators, hot water needs and installation requirements.

You get a clear quote

We recommend a suitable boiler and explain the full installation cost clearly.

We install and hand over

Your boiler is fitted, tested and explained before we leave your home.

  • Most straightforward boiler swaps are completed in a single day

Fixed transparent pricing

Transparent New Boiler Installation Costs & Packages

Three core installation scenarios cover most West London homes. Every replacement includes our 12-month workmanship guarantee, a free wireless digital thermostat, and your first year's annual service completely free.

Combi to combi swap packages

Installation package starting from £2,499

Every installation includes the bundle below as standard. Your final price depends on your current boiler type, flue position, hot water setup and whether any pipework or system cleaning is needed — the free survey settles all of it first.

  • FREE Wireless Digital Thermostat included
  • FREE Year 1 Annual Boiler Service worth £120, protects your warranty
  • Up to 10-year manufacturer warranty
  • Chemical flush & magnetic system filter
  • Old boiler removal & disposal
Book a free survey

Installation Scenarios & Typical Figures

Combi-to-Combi Swap

Like-for-like replacement in the same position. Includes system flush, magnetic filter, wireless digital thermostat and free Year 1 service.

from£2,499
System Boiler Replacement

Direct swap retaining your existing hot water cylinder and system setup. Includes chemical flush and free Year 1 service.

from£2,650
Full Combi System Conversion

Cold tanks and cylinder removed, pipework reworked, cupboard space freed up. High-flow combi installed.

from£3,500
In-Home Survey & Fixed Written Quote

We inspect your pipework, gas supply and radiators, then provide a single fixed price in writing. Zero obligation.

FREE

SIMPLE, STRESS-FREE BOOKING

How booking your local engineer works

Whether you need an urgent boiler repair, an annual service, or a quote for a new installation, getting an expert Gas Safe engineer to your door is straightforward. No call centres, no waiting in all day, and no surprise charges — just clear arrival windows, fixed upfront pricing, and payment only once the work is completed and fully tested.

Current Boiler Type & Location

Swapping like-for-like in the same position is simpler than relocating the boiler to an airing cupboard, utility room, or loft space.

Flue Route & Core Drilling

Using an existing horizontal wall flue route costs less than core-drilling a new vertical roof route or adding a plume management kit.

Hot Water Cylinder & Tanks

Retaining your cylinder on a system boiler vs decommissioning and removing cold water loft tanks to convert to an on-demand combi.

Gas Supply Pipework (22mm)

Checking your existing gas supply pipe diameter meets the mandatory 22mm gas flow rate required by modern high-kW combi boilers.

Heating Controls & Smart Tech

Standard wireless programmable room thermostat vs Google Nest, Hive, or smart multi-room TRVs for individual room zoning.

System Cleaning & Protection

Older heating systems benefit from a deep chemical powerflush and high-capacity Adey MagnaClean filter to protect the new boiler.

£2,499 complete installation package

Includes an A-rated boiler, magnetic filter, chemical flush, free wireless digital thermostat, and your first year's annual service free of charge. Surveyed and quoted in writing with zero obligation.

Book a survey

Why choose us

What Happens on Boiler Installation Day: 5-Step Process

Most straightforward boiler swaps are completed in a single day with minimal disruption. We make sure your new boiler is correctly sized, safely installed, properly commissioned and set up for your home.

  • Fixed written quotes: no hidden hourly meter
  • Up to 10-year manufacturer warranties
  • 12-month workmanship guarantee on installation
  • Homeowners, landlords & rental properties

Accredited & Local

Gas Safe registered 657972

  • Gas Safe registered 657972
  • £2m Public Liability insurance
  • Free survey and fixed written price
  • Warranty registered for you on the day

The Happy Heating Co. is a trading name of Home Warmth Services Ltd.

Book a free survey

Verified Local Feedback

The heating engineers your neighbours trust for new boiler installations

Replacing a boiler is a major investment in your home. From neat pipework and thorough system flushes to spotless cleanups and honest fixed quotes, read what local homeowners across West London say about our installation work.

Read all Google reviews
“Finally a plumber we can trust. Works quickly, tidily, and at a really fair price. Have cancelled our British Gas contract!”

Philip N.

Customer in Sloane Square SW1W

“I thank my lucky stars to have found Happy Heating! Adam was amazing, sorted our problem quickly, and left the place spotless.”

Davey M.

Customer in Putney SW15

“Really helpful, great communication, understood urgency and worked at short notice for a fair price. So glad I chose Adam.”

Ruth R.

Customer in Sheen SW14

“I am so relieved to have found Adam. Finding a good, reliable heating engineer in London is honestly like finding gold dust.”

Anuja W.

Homeowner in Sheen SW14

“Had a boiler fault no one else could diagnose. Adam found the issue quickly and repaired it for a reasonable price. 10/10!”

PJ S.

Boiler Repair Customer

“Great service from Adam and a very reasonable price. Friendly, punctual, and highly recommended!”

Lewis L.

Customer in Shepherd's Bush W12

“Adam was incredibly professional. Carried out both of our Landlord CP12 gas certificates quickly and without hassle.”

Monica R.

Landlord in Kensal Green NW10

“Adam is always friendly and professional. He does a great job every time on our annual boiler service. Highly recommend.”

Victoria J.

Customer in Barnes SW13

AREAS WE COVER

Check if we cover your postcode.

One postcode, one form. Tell us where you are and we will confirm before you give us anything else.

Type your postcode in and the checker tells you straight away whether we cover your area. If we do, you fill in the service you need and the best time for us to call.

  • Straight answer on coverage, no callback to find out
  • Free survey and a fixed written quote before anything is booked
  • Clear pricing agreed before any work starts
  • Plans changed? Just give us reasonable notice

Check if we cover your area

Enter your postcode below to confirm coverage. If you're in our West or North West London area, it unlocks the booking form right away.

Postcode Coverage Checker

No upfront payment. We only use your details to confirm your appointment.

Hover or focus an area to highlight it on the map.

On our doorstep

West London

Further out

Comprehensive Heating & Plumbing

Expert boiler, central heating & gas services

Every home and heating system is slightly different. Whether you have an older boiler in a Victorian terrace, a modern combi in a flat, or need safety certificates for a rental property, we always quote clearly upfront and do the job properly.

Boiler Care

Annual Boiler Servicing

Protect your manufacturer warranty and keep energy bills low with annual care.

View service

Smart Upgrades

Heating Upgrades

Google Nest, smart TRVs and magnetic filters fitted neatly to your system.

View service

Monthly Cover

Homeowner Plan

Full annual service, priority emergency dispatch, and maintenance cover.

View service

Fast Repair

Boiler Repairs

Rapid fault code diagnosis and genuine manufacturer replacement parts.

View service

Frequently asked questions

New boiler installation & replacement, clearly explained.

A new boiler is a major investment in your home. Here is everything you need to know about our all-inclusive £2,499 installations, free 1st-year annual service, 10-year warranties, system powerflushing, and our free in-home survey.

Read our FAQs

A new boiler installation usually depends on the type of boiler, the size of your property, the complexity of the installation and whether any heating system upgrades are needed. We provide clear quotes before any work begins, so you know exactly what is included.

Most straightforward boiler installations can be completed within one day. More complex jobs, such as moving the boiler location, changing boiler type or upgrading pipework, may take longer. We will confirm the expected timescale before starting.

Yes. Gas boiler installation must be carried out by a Gas Safe registered engineer. This helps make sure the boiler is installed safely, tested correctly and registered properly after installation.

The right boiler depends on your property size, hot water demand, number of bathrooms, existing heating system and available space. Common options include combi boilers, system boilers and regular boilers. We can assess your home and recommend the most suitable option.

Yes, in many properties an old boiler can be replaced with a modern combi boiler. This can free up space by removing stored hot water cylinders, but it depends on your water pressure, property size and hot water usage.

Yes, most new boilers come with a manufacturer warranty, but the warranty length depends on the boiler brand and model. To keep the warranty valid, the boiler usually needs to be installed by a qualified engineer and serviced annually.

Yes. As part of a boiler replacement, we can remove the old boiler and leave the work area tidy. We will explain what is included in your quote before the installation is booked.

Yes. We provide boiler installation and boiler replacement across West London, North West London and nearby areas. This includes homes and rental properties in areas such as Ealing, Acton, Chiswick, Hammersmith, Shepherd's Bush, Wembley, Harrow, Willesden and Kilburn.

LOCAL. GAS SAFE. STRAIGHTFORWARD.

Heating problem? Let's get it sorted.

Book a trusted local engineer for boilers, heating and plumbing across West and North West London.

Gas Safe registered · 657972★★★★★ 5.0 Google reviews£2,000,000 Public Liability Insured
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