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    Vaillant ecoTEC High Output System Boilers

    New Vaillant ecoTEC High Output System Boilers can cost between £2,177.78 and £2,799.15 including VAT and excluding installation.

    Vaillant ecoTEC High Output System Boilers

    Manufactured by Vaillant, the ecoTEC High Output System comes in 46kW and 65kW outputs and can operate alone or be installed in cascade (when multiple units are connected).

    This condensing wall mounted boiler measures 800mm (H) x 480mm (W) x 450mm (D) and is designed to be fitted alongside a hot water storage cylinder. As most of the key components are built into the unit, installation is easier, quicker and neater.

    Ideal for large homes and commercial properties, the ecoTEC System comes with a standard 5-year warranty and typically costs between £2,177.78 and £2,799.15.

    Boiler Energy Efficiency Credentials

    This high-performance system boiler has an ErP efficiency rating of over 95% and is considered an A rated appliance. If you don’t already have a hot water cylinder or are looking to upgrade your existing one, the boiler can be installed with a Vaillant uniSTOR cylinder to minimise heat loss and lower running costs. The ecoTEC System is also compatible with optional wired and wireless weather compensators, which can help to increase levels of comfort and running cost savings.

    ecoTEC High Output System Technology and Main Advantages

    The high output ecoTEC System boasts a whole host of built-in features, such as a high-quality stainless steel heat exchanger to provide adequate protection from oxidation and corrosion. To make installation easier, this boiler has a pump and integrated connection for an expansion vessel.

    Vaillant’s ecoTEC System includes built-in energy saving two-stage frost protection so that the boiler always performs at its best all year round, as well as a fully modulating low NOx burner to help lower NOx emissions. In addition to these functions and parts, the boiler is equipped with an air separator with auto vent and filter, push-fit flue system and other flue options.

    By allowing your engineer easy access to all of the components, repairs and servicing can be kept simple and straightforward. The appliance also has a clear backlit display to provide your engineer with the correct status and diagnostic information and to ensure you can you manage the boiler with ease.

    Is the ecoTEC High Output System the Right Boiler Type and Size for Your Home?

    Available in high outputs of 46kW and 65kW, the ecoTEC System is specifically designed for commercial applications and larger homes with two or more bathrooms. You can use the boiler as it comes or link multiple units to allow for cascading operation and to provide a higher overall output. So, if you have larger heating and hot water needs, this boiler is the perfect solution. We should also mention that this model does not require a feed and expansion tank in the loft, making it ideal if you have little or no loft space. However, this boiler won’t be suitable for all large properties, and you must always ask a Gas Safe engineer to help you determine the right model for you and your home.


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    A-rated combi boiler Save money on your gas bills
    Cascade operationHigher output and increased flexibility
    Clear backlit displayUser friendly boiler
    High-quality stainless steel heat exchangerProtection from oxidation and corrosion
    Built-in two-stage frost protectionOptimal performance all year round
    Easy access to all componentsEasier to install, repair and service
    Low NOx emissionsEnvironmentally friendly
    5-year parts and labour warrantyConfidence and peace of mind

    Our Honest Opinion of the Vaillant ecoTEC High Output System

    If you’re looking to replace your old system boiler or even a regular boiler and want minimal upheaval, the Vaillant ecoTEC High Output System is a fantastic choice. Whilst the boiler is too big to be placed in a kitchen cabinet, it can be added to your existing cylinder and be installed in a storage cupboard so that it remains out of sight.

    The heat outputs on offer mean that this appliance can provide large homes with plenty of heat and hot water – and the boiler can even be used as part of a cascade system. You may also be interested to know that an LPG (liquefied petroleum gas) conversion kit is available for the 46kW model only.

    By being an A-rated boiler, the ecoTEC System will reduce energy consumption and lower your energy bills. Plus, the no-quibble 5-year warranty means you’ll have plenty of cover if the boiler needs repairing in the future.

    Advice on Boiler Quotes and Gas Safe Engineers

    We recommend you get quotes from both local and national installers to find the best price for your new Vaillant ecoTEC High Output System Boiler. It’s always a good idea to ask for a fixed price on the boiler and installation work when obtaining quotes to ensure you remain protected from any hidden charges. Also, you must make sure your chosen installer is listed on the Gas Safe Register website to confirm that they are legally allowed to work on gas boilers. Alternatively, you can ask to view your installer’s Gas Safe ID card to check their qualifications and registration status.


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