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How to buy a Vaillant boiler

Find the boiler that is perfect for you

installer and woman looking at the boiler

What you'll learn

  • What are the costs of buying a new boiler?
  • Guarantees
  • Boiler Plus
Find a Vaillant installer

Reasons to replace your current gas boiler

Upgrading your boiler can be a costly investment but there are multiple benefits of modernising and replacing your existing boiler:

  • New boilers are often more energy efficient resulting in savings on household energy bills. Paired with a Vaillant heating control or thermostat, you can potentially make even greater savings on your bills without being wasteful. New boiler installations must comply with Boiler Plus Government legislation meaning they must have a temperature control fitted and the heating system must meet or exceed an ErP efficiency of 92% during operation.

  • If you have an old boiler that is non-condensing, it will probably be classed as a band G boiler, with an energy efficiency of less than 70%. All Vaillant boilers are ErP 'A rated', meaning they have an energy efficiency of 90%.

Need a replacement boiler? It's as easy as 1,2,3

  1. boiler standing on a wall in a kitchen
  2. an installer shaking hands with a homeowner
  3. three people talking around a table
  1. 1

    Find your perfect boiler

    At Vaillant, we manufacture three different types of gas boilers; combination (combi) boilers, system boilers and regular (open vent) boilers. Our products suit a wide range of homes and living spaces.

    If you’re thinking of upgrading your boiler, you must consider the size of your home, budget and your heating and hot water demands. With guarantees of up to 10 years available through your Vaillant Advance installer, you can be confident that our gas boilers offer the highest levels of quality, reliability and performance.

    See our full product range and choose a boiler that will suit your central heating and hot water demands.

    If you‘re unsure as to what boiler would best suit your home, try our find a boiler tool here.

  2. 2

    Find your local installer

    Once you've found your perfect boiler, you'll need to find a local accredited installer for a quote. Our ‘Find an installer’ tool will help you find your nearest Vaillant Advance installer. Simply give a few details such as postcode, and the tool will do the rest.

    At the end, you'll be presented with a list of your local installers.and they will get in touch with a no-obligation quote for the boiler and installation.

    All our installers can provide you with expert advice on the best solution for your heating and hot water requirements. To find your local boiler installer near you, click here.

  3. 3

    Consultation

    After filing out the Find an Installer form and you've heard back from them all, your chosen installer will visit your property to scope out the type of installation. They will look at your current heating system, boiler placement and if any further work needs to be carried out.

    They may ask you some questions about your radiators, what type of heating control you want fitting and access to and from your property.

    The installer will also provide you with a quote for the work carried out and how long the installation will take to complete.

    This will also be the opportunity to ask your installer any questions about your new heating system and you can arrange a fitting date to suit you directly with your installer.

Register your boiler’s guarantee

Once you’ve had your new boiler installed, you can register your guarantee online through myVAILLANT Web online portal or your installer can do it on your behalf and offer an extended guarantee period.

Your Vaillant guarantee covers you for the repair of any defects related to the manufacturer of your Vaillant appliance. The repair will be called out by one of our service engineers and will cover both parts and labour.

Learn more about guarantees and the terms and conditions here.

Find your perfect heating system

Find a Vaillant installer Find a Vaillant boiler

Read more

  1. MODERNISATION

    Is my home suitable for a heat pump?

    Read here
  2. CYLINDERS

    What is a hot water cylinder?

    Read more
  3. BOILER ADVICE

    What pressure should my boiler be?

    Read here