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Plumbing Company london | Combi Boiler Installation

Aug 24
boiler installer London
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About combi boilers

Upgrade for a new boiler

Are you considering upgrading your home’s heating system? Combi boiler installation is becoming an increasingly popular choice for homeowners, offering energy efficiency, space-saving design, and an unlimited supply of hot water. In this comprehensive guide, we will delve into everything you need to know about combination boiler installations, from understanding their components and how they work to selecting the right model and preparing for the installation process. Let’s get started!

Short Summary

  • Combi boilers offer an efficient and space-saving solution for residential heating and hot water.
  • Installation should be completed by a gas-safe registered engineer to ensure safety, efficiency, and peak performance.
  • Financing options are available to make the cost of installation more manageable.


A modern combi boiler installed in a home


Understanding Combi Boiler’s

Combi boilers are an ideal choice for residential heating and hot water in North London, as they combine a heat exchanger, expansion vessel, and pump to provide instant hot water. These compact units draw directly from the mains water supply, eliminating the need for a separate water storage tank and making them perfect for small-to-medium-sized homes with one bathroom.
The gas-safe installation and process are crucial, as a proper installation ensures safety and also efficient boiler performance. It’s essential to select the right model and have a Gas Safe registered engineer complete the installation, following strict protocol checks and procedures.


Combination Boiler Components

Combination boilers consist whole central heating system made of an expansion vessel, pump, fan, gas valve and many other parts, all integrated into one compact unit. This design differs from a system boiler, which requires a separate hot water cylinder, as most of its main components and features are already integrated into the combination boiler itself.
The installation of gas combi boilers typically takes around one day, but it may require additional time if new tanks need to be installed. With this one boiler system, you can enjoy the benefits of a space-saving design, instant hot water, and improved energy efficiency.

How Combi Boilers Work

Combi boilers utilize a gas-powered heat exchanger to rapidly heat water, which is then supplied directly to the tap at main pressure. This unique design offers several advantages, such as a longer lifespan, efficiency, space-saving design, and mains water pressure.
The process for installing a gas boiler involves evaluating your home’s requirements, calculating the heat demand, selecting an appropriate gas combi boiler part, preparing for the installation, and comprehending efficiency ratings. Ensuring the safety of a gas boiler installation is paramount, and only certified gas engineers should install it.


A modern combi boiler with energy efficient features


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Advantages of Choosing a Combi Boiler

Combi boilers boast numerous benefits, making them an attractive choice for homeowners. Their energy efficiency means they consume less gas, resulting in lower energy bills. The space-saving design of combi boilers eliminates the need for a separate hot water tank, making them perfect for small homes or properties with limited space to install boilers.
Additionally, modern combi boilers provide an unlimited supply of hot water from the mains, ensuring you never run out of hot water when you need it. These advantages make combi boilers a popular and practical choice for many households.


Energy Efficiency


Combi boilers are required to have an efficiency level of at least 92%, but some models can reach efficiencies of between 95% and 98%. This is significantly better than older boilers, which can result in considerable energy and cost savings for homeowners.

For example, upgrading from a 70% efficient conventional boiler to a 92% efficient combination boiler can save approximately £300 annually on energy bills. Furthermore, replacing an old boiler with an A-rated boiler and heating controls can save an estimated £340 and 1,500kg of carbon dioxide emissions per year.

Space-Saving Design

One of the major advantages of combi boilers is their compact, space-saving design. Unlike traditional boilers that require a separate hot and cold water tank, combi boilers are single-contained units that can typically be accommodated within a kitchen cupboard or utility room. This makes them an ideal choice for small homes or properties with limited space, as they don’t take up valuable floor space.

Additionally, combi boilers eliminate the need for a cold water storage tank, further reducing the space required for your heating and hot water system.


Factors Influencing Cost

Several factors can influence the cost of a combi boiler installation, such as the type of boiler you choose, whether you’re replacing an existing boiler or transitioning to a different type, and if the replacement boiler needs to be relocated to another area in your home.
Additionally, the cost may be affected by the complexity of the installation, the size of your property, and any necessary upgrades to your existing pipework.
It’s important to consider these factors when budgeting for your boiler installation to ensure you get the best value for your money.

Combi Boiler Prices

The price ranges for boiler installations vary depending on the size and type of the existing boiler used, as well as the complexity of the installation. For a small 24-27kW combi four boilers fitted for installation when replacing an old combi boiler with a new one, the price range is between £1,975 and £2,925.
For a larger 35-42kW combi boiler installation when replacing an old combi boiler with a new one, the price range for new combi boiler prices is between £1,845 and £4,500. The cost range for a conventional-to-combi boiler replacement is £3,500.
Keep in mind that these are general price ranges and can vary depending on your specific situation and location. The larger boiler you need the more you have to pay for the boiler. The labour price does not differ a lot.

Selecting the Right Combi Boiler

To select the right combi boiler for your home, it’s essential to consider top brands, such as Worcester Bosch, Baxi, Vaillant, and Ideal, as they are known for their reliability, quality, and performance.

Additionally, determining the right size (kW output) for your combination boilers is crucial in ensuring it can efficiently meet your home’s hot water and heating needs. By considering these factors, you can make an informed decision and choose the best combi boiler for your home.

Top Combi Boiler Brands

Popular combi boiler brands include Worcester Bosch, Vaillant, and Ideal, all known for their high-quality products and excellent performance. Worcester Bosch, for example, has been a leading presence in the British boiler industry for many years and has received numerous awards for its products and customer service.

Vaillant, on the other hand, is a well-established brand in the European market and enjoys a highly esteemed 5-star reputation. By choosing a combi boiler from a reputable brand, you can be confident in the quality and performance of your new heating system.

Determining the Right Size (kW Output)

The kW output of a combi boiler directly affects its ability to meet your home’s hot water and heating needs. For example, a 24-27kW combi boiler would be suitable for a 1-2 bedroom property with 1 bathroom, while a larger 35-42kW combi boiler would be better suited for a 4 bedroom home with multiple bathrooms.


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