Fast & Reliable Boiler Installation in London

Need a new boiler in London? Waterguys provides expert, Gas Safe boiler installations, carried out quickly and safely. With 20+ years of experience, we offer efficient solutions, including combi and system boilers. Get in touch today!

No Parking Charges

No Congestion Charges

No ULEZ Charges

Boiler Installations In Central London

Boiler breakdown regularly happens at the most inconvenient time. In Central London, it can be difficult and expensive to arrange emergency repairs or boiler replacement at short notice. If your gas boiler is more than 10 years old, it’s likely coming to the end of its life. Not only that, older boilers become increasingly inefficient and less environmentally friendly with the passage of time.

So, don’t wait for disaster to strike! Trying to prolong the life of an old boiler with numerous repairs is often far less cost-effective than installing a brand new, energy efficient boiler.

The WaterGuys will install your new central heating boiler and register it with a 10 year warranty on parts and labour.

Check out our Checkatrade reviews to see for yourself.

10 Year Parts and Labour Warranty

Don’t wait for your aging boiler to fail. WaterGuys offers quick, safe installations of new, energy-efficient boilers with a 10-year warranty. Avoid costly emergencies and upgrade today. 

Types of Boilers we Install

Combi Boilers

Combi boilers provide hot water on demand, providing an excellent choice for smaller properties with one bathroom and low water demand.

Heat Only (Regular) Boilers

Also known as ‘conventional or ‘regular’ boilers, heat-only boilers are a good choice for larger homes with more than one bathroom in use at a time. This high water demand calls for a cold water feed tank and a hot water storage tank (often installed in the loft).

Heat-only boilers connect to a water tank to provide hot water directly to your radiators. The boiler can be turned on or off, enabling you to heat and store water in the storage tank as and when you need it.

The most common heat-only boiler system requires a cold water feed and an expansion tank in the loft. The components of heat-only boilers, such as the circulation pump are externally housed from the boiler.

System Boilers

System boilers, sometimes known as ‘closed vent’ or ‘sealed system’ boilers are a good choice If you have a larger home with high water demand but poor water pressure. We would be more than happy to talk you through the advantages of a system boiler. These boilers are similar to conventional boilers. They do require a hot water cylinder but don’t need a cold water feed tank.

System components such as pumps and valves are built in, making a system boiler a great choice if you want a heat-only boiler but don’t want lots of external components.

We only install market leading brands, including:

Why Choose WaterGuys?

We're Highly Rated

We're consistently rated as 'excellent' by our loyal customers. See our ratings on Checkatrade.com.

Our Work is Guaranteed

We provide a 12 month labour guarantee on our workmanship. We are proud of our work.

Central London Based

We serve the whole of Central London and surrounding areas from our Marylebone HQ.

Gas Safe Registered
National Inspection Council for Electrical Installation Contracting
Checkatrade 5 star Service

Our Checkatrade Reviews

checkatrade-ICON

10/10

155 reviews

These guys are honest, knowledgeable & helpful so you save you time & money...
Read more

Verified Review

WH1

Very responsive, courteous, extra effort to determine and fix issue, tidied up all after.
Read more

Verified Review

NW8

Went to a lot of trouble sourcing matching fittings - which they got at a very reasonable price...
Read more

Verified Review

W1G

Timely, effective and responsive.
Read more

Verified Review

W1H

Turned up on time as agreed, with the right equipment for the job and completed the job quickly.
Read more

Verified Review

W1T

Michael and George resolved the issue which many others couldn’t...
Read more

Verified Review

W1G

All round excellent. Fixed with no fuss. I still curse the day I called Pimlico plumbers.
Read more

Verified Review

W2

Michael and George were fantastic at installing our new boiler! Happy with everything...
Read more

Verified Review

W1G

WaterGuys have been amazing. I was recommended to use them by one of my....
Read more

Verified Review

NW1

I've used Scott a couple of times and always found him to be knowledgeable and helpful...
Read more

Verified Review

WC1E

Really pleased with the work, and especially impressed with the speedy, professional...
Read more

Verified Review

W2

Very professional firm~great for Central london~fair pricing~just straightforward people...
Read more

Verified Review

W1U

Completely work exactly as requested - very professional and we are very happy...
Read more

Verified Review

W2

Michael came very promptly to do a diagnosis which turned out to be a faulty valve...
Read more

Verified Review

SW1W

Fast response time and carried out work in a tidy fashion. Friendly and helpful advice.
Read more

Verified Review

W9

Michael and Scott have been brilliant! They have sorted out the bathroom plumbing issues...
Read more

Verified Review

ME19

Scott sorted out my plumbing issue today very efficiently. Polite, professional...
Read more

Verified Review

SW!P

Michael and George from Waterguys installed us a new boiler and we couldn’t be happier!!
Read more

Verified Review

W1G

Polite, Friendly and efficient. I have booked Scott for further plumbing work.
Read more

Verified Review

SW1P

I've been a client of Waterguys for several years and always found them extremely...
Read more

Verified Review

NW5

Very professional, courteous, competent and pleasant.
Read more

Verified Review

W1H

Waterguys did a fantastic job installing a new boiler in our flat. They were responsive...
Read more

Verified Review

SW1V

Very pleased with Water Guys. Professional and reliable throughout....
Read more

Verified Review

SW1P

From the first phone call Scott organised and explained everything well. He was prompt...
Read more

Verified Review

NW1

Very happy with the work, arrived on time, tidy, invoiced as per the quote.
Read more

Verified Review

SW3

Our Google Reviews

FAQs About Boiler Installation Services London

The duration of a new boiler installation in Central London can vary depending on several factors:
  • Like-for-like Replacement: A straightforward swap of an old boiler for a new one of the same type and in the same location can often be completed within a single day, typically 4-8 hours.
  • Boiler Type Conversion: Switching to a different type of boiler (e.g., from a conventional to a combi boiler) usually takes longer, potentially up to 1-2 days, due to necessary pipework and system modifications.
  • Relocation of Boiler: Moving the boiler to a new location within your property will add to the installation time, as new pipe runs and flue arrangements will be required. This can extend the project to 1-2 days or more.
  • New Heating System Installation: Installing a completely new heating system alongside the boiler will naturally take the longest, potentially 2-3 days or more, depending on the size and complexity of the system.
  • Property Specifics: Older properties in Central London may present unforeseen challenges that could slightly extend the installation time.
Our comprehensive boiler installation service in Central London typically includes:
  • Removal and Disposal of Your Old Boiler: Safe and environmentally responsible removal of your existing boiler.
  • Installation of the New Boiler: Expert fitting of your chosen new boiler by Gas Safe registered engineers.
  • Connection to Existing Pipework and Supplies: Secure connection to your gas, water and heating system.
  • Flushing of the Central Heating System: Cleaning the system to remove sludge and debris, ensuring optimal performance and protecting your new boiler.
  • Installation of a Magnetic System Filter: Fitting a filter to capture circulating debris and prolong the life of your boiler.
  • Commissioning of the New Boiler: Thorough testing and setup of your new boiler to ensure it’s working safely and efficiently.
  • Safety Checks: Comprehensive gas safety checks to ensure compliance and your peace of mind.
  • Demonstration of Boiler Controls: A clear explanation of how to operate your new boiler.
Regarding thermostats and programmers: While we can supply and install a wide range of thermostats and programmers (including smart controls), these are usually quoted and purchased separately. We will discuss your control requirements with you during the consultation to ensure you have the best system for your needs.
Choosing the correct boiler size and type is crucial for efficiency and comfort. Our Gas Safe registered engineers will conduct a thorough assessment of your Central London property, taking into account factors such as:
  • Property Size and Layout: The number of rooms and the overall size of your home.
  • Number of Bathrooms and Showers: Your hot water demand.
  • Insulation Levels: How well your property retains heat.
  • Existing Heating System: Whether you have a traditional system with a hot water cylinder or a more modern setup.
  • Your Hot Water and Heating Requirements: Your specific needs and preferences.
Based on this assessment, we will recommend the most suitable boiler size (measured in kilowatts – kW) and type (e.g., combi, system, or heat-only boiler) from a range of leading and reliable manufacturers such as Worcester Bosch, Vaillant and Ideal, ensuring optimal performance and energy efficiency.
Installing a new, modern boiler can offer significant energy efficiency benefits for your London home:
  • Higher Efficiency Ratings: Modern boilers are significantly more energy-efficient than older models, often achieving A-ratings (over 90% efficiency). This means less wasted energy and lower fuel bills.


  • Condensing Technology: Most new gas boilers are condensing boilers, which recover heat from the flue gases that would otherwise be lost, further improving efficiency.
  • Improved Controls Compatibility: New boilers often work seamlessly with modern, energy-saving controls like smart thermostats and zone controls, allowing for more precise heating management.


  • Reduced Carbon Footprint: By using less fuel, a new, efficient boiler helps to reduce your carbon emissions.


  • Potential Cost Savings: Over time, the energy savings from a new boiler can help to offset the installation cost.

WaterGuys stand behind the quality of our workmanship and the boilers we install in Central London. We typically offer:
  • Manufacturer’s Warranty: The new boiler itself will come with a manufacturer’s warranty, the duration of which varies depending on the brand and model (often up to to 10 years).
  • WaterGuys Installation Guarantee: We also provide our own guarantee on the quality of our installation work, giving you further peace of mind. The specifics of this guarantee will be outlined in your quotation.
We are committed to ensuring your complete satisfaction with your new boiler installation.

Boiler Insights From Our Experts

Scroll to Top

Request a call back

Please fill in the form below and a member of the team will be in touch. Alternatively, call us on 020 313 77749.