Combi Boiler
Heats your home and provides hot water on demand without a separate hot water cylinder.
Flats and small to medium-sized homes.
Professional Boiler Installation Across London
Boiler Installation in London by Gas Safe Registered Engineers
Fixed Price, Fully Guaranteed
Gas Safe registered engineers, Ideal boilers, clear fixed-price quotes and no hidden extras.
Free home survey · Clear written quote
Gas Safe registeredEngineers · 198664Fully insuredFixed-price quotes25+ years of experience
A fresh start for your heating
Reliable warmth. Hot water when you need it.
Is your boiler old, unreliable, losing pressure or expensive to run? London Safe Gas provides professional boiler installation in London, replacing tired boilers with modern A-rated models for reliable heating and hot water and potential energy savings. Every installation is carried out by Gas Safe registered engineers, and we explain the applicable manufacturer warranty and our workmanship terms before you decide.
- Modern, energy-efficient heating
- Reliable hot water
- Reduced breakdown risk
- Professional installation
Find the right fit
Which type of boiler suits your home?
Boiler models we install
From Ideal boiler installation to Vaillant, Baxi, Worcester Bosch and Main replacements, we help match the model and output to your heating system and hot water demand.
Combi
Ideal Logic Max Combi²
C24 · C30 · C35
From £1,700
Compact combination boiler for heating and hot water on demand. Flats and small to medium-sized homes, subject to hot water demand.
- Warranty
- Manufacturer terms confirmed in your quote
Combi
Ideal Vogue Max
C26 · C32 · C40
From £1,700
A choice of three hot water outputs to match your household. Homes needing a higher hot water output without a separate cylinder.
- Warranty
- Manufacturer terms confirmed in your quote
Not sure which boiler is right for your home? Our team can help recommend the most suitable option following a free survey. Choosing the correct boiler size is important for efficiency and long-term performance.
Your installation quote
Know exactly what's included
Your written quote sets out the supply and installation of your chosen boiler and its commissioning. The items below are agreed during your free survey and listed in your quote, so you know exactly what you are paying for.
- Supply & installation of chosen boiler
- Old boiler removal & disposal
- Flue kit & fittings
- System flush
- Magnetic system filter
- Inhibitor
- Thermostat & controls
- Gas Safe commissioning
- Benchmark documentation
- Manufacturer warranty registration
- Building Regulations notification
- Customer handover
- Site clean-up
From first call to first warm evening
How your installation works
A straightforward like-for-like combi replacement may typically take one day, depending on your property and installation requirements.
A clear quote for your home
Boiler installation prices
Boiler installations start from £1,700. Get a fixed-price quote following your free survey.
What changes the price
- Boiler size — The output (kW) needed for your home and hot water demand.
- Flue changes — A new flue route or extension, or a vertical flue through the roof.
- Moving the boiler — Relocating to a new position needs extra pipework and gas runs.
- System flush — Older or sludged systems may need a power or chemical flush.
- Controls — Upgrading to smart thermostats or additional heating zones.
Ideal Logic Max
Starts from £1,700
Ideal Vogue Max
Starts from £1,700
Vaillant
Starts from £1,700
Baxi
Starts from £1,700
Worcester Bosch
Starts from £1,700
Main
Starts from £1,700
Looking after your investment
Warranty & aftercare
Clear warranty terms
Manufacturer warranty lengths and conditions vary by model and registration. We confirm the applicable manufacturer terms, registration arrangements and workmanship guarantee in your written quote, rather than promise one period for every boiler.
Support beyond installation
Keep your boiler running safely with regular servicing. Annual servicing may be a warranty condition. Our heating team can help with ongoing servicing, fault diagnosis and repairs.
Local Gas Safe engineers
Boiler installation across London
We cover North West, West and Central London, including Hendon, Golders Green and Barnet. Find your local heating page below.
Don't see your area? Get in touch.
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What our customers say
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Boiler installation FAQs
Your next step
A warmer home starts with a free quote.
Tell us a little about your home. We'll call to discuss your new boiler installation and arrange your free home survey.
Installation scope and warranty terms are confirmed in your quote. Read our terms & conditions.