Get Your Combi Boiler Installation For Energy Efficient Hot Water
Trusted Boilers have one of the largest choices of high-quality modern combi boilers in South London, offering low-cost installations, servicing, and maintenance.
Modern energy-efficient boilers from Baxi, Worcester Bosch, Viessmann, Vaillant, Ideal, and Main
Fast, personalised service
15 years industry experience
Gas Safe registered and OFTEC accredited
Low prices and 40% deposit required on some models.
Ongoing maintenance and repairs are also available.
We offer a complete installation service, starting with a home visit or video call survey to help us understand your needs. We will then guide you through a choice of boilers to meet your home heating needs and budget, order everything for you, then install your boiler at a convenient time, test it, and sign it off.

Fast, Personalised
Service

15 Years Industry Experience

Gas Safe Registered & OFTEC Accredited

Competitive
Pricing

Ongoing Maintenance
Available
How Much Does a Combi Boiler cost?
A ‘combi’ or combination boiler is a compact unit that provides both hot water and central heating from a single unit. Unlike a traditional boiler or a system boiler, a combi does not need a separate hot water storage cylinder or cold-water tank, as it heats water directly on demand.
This makes combi boilers perfect for apartments and smaller 1-to-3-bedroom homes with limited space and modest hot water demand, giving you an efficient and convenient way of delivering hot ater instantly whenever needed.
Combi Boilers

Baxi 600 Combi 2
The Baxi 600 Combi 2 features brass hydraulics and a stainless-steel heat exchanger.
- Brass hydraulics and stainless steel heat exchanger for peace of mind
- Available in outputs of 24, 30 and 36kW
Prices from £2000

Gas Combi Boilers
The go-to boiler for smaller homes that want to keep an eye on bills, efficiency, and space. Designed to be tucked away inside a kitchen cupboard, and with a QuickTap feature to cut down on water usage, the Greenstar 1000 is a budget friendly solution that’ll give most small homes everything they need.
- Available outputs 24kW, 30kW
- Guaranteed Peace of mind for 5 years when installed with a magnetic filter
Prices from: £1850

ecoTEC Plus
Extremely reliable and displaying all the in-built quality Vaillant is known for, the ecoTEC plus is clearly one of the best combi solutions available today. Available in a range of power outputs 26kw, 32kw, 36kw, 40kw. the ecoTEC plus has been remastered to create a stylish, modern and extremely efficient boiler, perfect for any home.
- Vaillant protection pack & magnetic filter
- 10 year guarantee
Prices from £2850

Vitodens 100-W
Vitodens 100-W wall mounted gas condensing boilers (system boiler and combi boiler). The popular solution for medium sized homes with 2-4 bedrooms and 2 bathrooms.
- Superior build quality & Stainless steel Heat engine
- Rated heating output: 3.2 to 32 kW
- Simple and intuitive operation
- Attractive price/performance ratio
- System filter
Prices from:2300
.webp)
Frequently asked questions
Typically yes for like for like models, but this will be subject to a site survey. Get in touch today to book a free site survey with one of our team, and we are happy to recommend a new boiler that matches the footprint of your old one.
This depends on the capacity of the boiler you pick and how old your current boiler is. If you are upgrading to a larger capacity boiler, it may be bigger than your old one. However, please bear in mind that newer models are often more compact than older boilers. You may be able to purchase a more powerful or higher capacity boiler with an equal or smaller footprint than your current unit. Also, some brands, makes, and models are larger or smaller than others. Get in touch to find out more.
Most new boilers come with a standard manufacturer’s warranty of five years, but this depends on the boiler you pick. Some offer a 10-year warranty. To claim on your warranty, you will need to service your boiler once a year and demonstrate an annual service history.
A well-maintained new modern boiler should provide a good service life of 10 to 15 years. However, this can depend on the make and model. Even an entry-level combi boiler from a quality manufacturer should last you 10 years, as long as you keep up with its servicing.

Confused About Choosing Between a Combi or Conventional Boiler?
Brands we install






Accreditations



