Buy a Combi Boiler with Installation Included

Purchase a Combi Boiler with Installation Included from Master Gas London. Explore our comprehensive Combi Boiler Guide for expert insights and tailored recommendations. With transparent pricing, professional installation, and top-tier service, we ensure a seamless experience. 

Combi boiler installation from £1900

Combi Boilers: The Complete Guide

A combi boiler may be the best option for you if you want a heating system that provides both central heating and hot water on demand without the need for a separate water tank. What exactly are combi boilers?. This guide will help you to understand everything you need to know about combi boilers, the history, efficiency, pros & cons.

Combi Boiler Offers

New boiler installation from £1900

Vaillant Installation
From £2200

Get a New Vaillant Boiler Installation with 10 year Parts & Labour Warranty Included

Worcester Bosch Greenstar 4000

Worcester Installation
From £2200

Get a New Worcester Bosch Boiler Installation with up to 12 years Parts & Labour Warranty Included

Baxi boiler installation

Baxi 800 Installation
From £1950

Get a New Baxi 800 Boiler Installation with 10 year Parts & Labour Warranty Included

Glow worm boiler installer

Glow Worm Installation
From £1900

Get a New Glow Worm Boiler Installation with up to 10 years Parts & Labour Warranty Included

About Combi Boilers

Combining a high-efficiency water heater and a central heating boiler into one unit is what combi boilers, also known as combination boilers, do. Without the need for a separate water tank or cylinder, they give your house both hot water and heat your radiators. Since combi boilers do not require a separate water tank or external components, they are perfect for houses with limited space.

Hisory of Combi Boilers

Early 1960s saw the introduction of combi boilers, but it wasn’t until the 1990s that they really took off in the UK. They were initially intended to offer small apartments and dwellings energy-efficient, space-saving heating and hot water. eliminating the requirement for hot water storage cylinders and cold water storage tanks. Combi boilers are one of the most widely used types of boiler in the UK today and are used in homes of all sizes.

Efficiency of Combi Boilers

Efficiency is one of the major benefits of combi boilers. Combi boilers utilise less energy than traditional boilers since they only heat water when it is required, as opposed to keeping it warm in a tank. They can therefore assist you in lowering your carbon impact and save money on your energy bills. Combi boilers can achieve even greater efficiency when installed with smart technology, such as a smart thermostat and smart radiator valves.

Pros of Combi Boilers

Compact Size

Combi boilers require less space as they remove the need for cold water storage tanks and hot water storage cylinders. This makes them ideal for homes where space is at a premium.


They only heat water when it’s needed, this makes them more energy-efficient than traditional boilers connected to hot water storage cylinders.


All components are housed within the boiler, therefore covered under the manufacturers warranty. 

Cons of Combi Boilers

Limited Hot Water Supply

If you have a large household and need to use multiple hot water outlets at the same time, a combi boiler might not be able to keep up with demand.

No Backup Hot Water

If your combi boiler breaks down, you won’t have any backup hot water.

Combi Boiler Installations From £1900

What's included in a new boiler installation

Combi Boiler Deals
From £1900

Looking for a new combi boiler? Master Gas London has got you covered with our latest offer starting from just £1900, including installation.

Things to Consider


Make sure you choose a combi boiler that’s the right size for your home and your hot water needs


Choose a reputable brand with a good track record for reliability and performance such as Worcester Bosch, Vaillant, Baxi or Glow Worm.


Make sure you have your combi boiler serviced regularly to keep it running smoothly and efficiently.

Summary of Combi Boilers

In conclusion, homeowners that desire an effective, space-saving heating and hot water solution frequently choose combi boilers. They have both pros and cons. For many households they are the most popular choice. If you’re thinking about getting a combi boiler for your property, make sure to choose a reputable brand and hire a trusted and reviewed company to install and service it.

Combi Boiler Brands we Install...

At Master Gas London, we’re proud to install quality boiler brands such as Worcester Bosch, Vaillant, Baxi, and Glow Worm. Our expert gas engineers are fully trained and experienced to install any model of boiler from these brands. As an approved installation provider for these leading manufacturers, you can trust that we have the knowledge and expertise to carry out quality high-end boiler installations. Contact us today to book a combi boiler installation and experience the Master Gas London difference.

Combi Boiler installations Hassle Free...

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What Our Customers Say...


A combi boiler is a type of boiler that provides both heating and hot water to your home in one compact unit. It works by heating water directly from the mains supply as and when it is needed.

The size of your property, number of bathrooms and radiators will determine the size of the combi boiler required for your home. Use the free Master Gas London quote tool to find the correct sized combi boiler for your property.

The lifespan of a combi boiler can vary depending on factors such as the brand, model, usage and maintenance. On average, a combi boiler can last between 10 and 15 years.

Combi boilers do not require a separate hot water tank or hot water storage cylinder. They only heat water when needed. This means reduced heat loss and waste, resulting in higher efficiency and cheaper energy expenses.

Yes, a combi boiler can supply hot water to multiple taps and showers at the same time. It is always dependant on the flow rate of the cold mains to the property. With any pressurised system the flow rate and bar must be adequate.

It’s recommended that a combi boiler should be serviced once a year by a Gas Safe registered heating engineer. Regular servicing helps to ensure that the boiler is running safely and efficiently.

Pros of a combi boiler include: compact size, energy efficiency, on-demand hot water, and reduced energy bills. Cons of a combi boiler include: limited hot water supply, may not be suitable for larger properties or high hot water demand.

The cost of installing a combi boiler can vary depending on factors such as the brand, model, and the complexity of the installation. On average it can cost between £1600-£4000 for a combi boiler installation.