The Vaillant ecoFIT Pure 825 combi gas boiler is a top choice for smaller homes with 10-15 radiators and 1 bathroom, offering efficient and reliable heating. As a combi boiler, it heats water on demand and eliminates the need for a separate water tank, making it an ideal solution for compact spaces. With a 94% efficiency rating and an ErP A-rating, this boiler is both energy-efficient and environmentally friendly.
Key Features of the Vaillant ecoFIT Pure 825
- Central Heating Output: 19.1kW – perfect for consistent heating throughout your home.
- Domestic Hot Water (DHW) Output: 25.2kW – ensures adequate hot water for smaller households.
- Compact Size: Measuring 700x390x295mm (HxWxD), it fits neatly in a standard kitchen cupboard.
- Build Quality: Includes a high-spec aluminium heat exchanger for durability and longevity.
- Energy Efficiency: Designed with 4-sided cooling and heating of the heat exchanger, reducing energy waste
Is the Vaillant ecoFIT Pure 825 Right for You?
This boiler is ideal for homes with moderate heating and hot water needs, such as properties with 1 bathroom. If your home requires higher output, consider the ecoFIT Pure 830 or ecoFIT Pure 835 models. For large properties, Vaillant’s ecoTEC Plus 64kW system boiler is the most powerful option available.
What is the output range on a Vaillant ecoFIT pure 825?
Combi boilers exhibit separate output ratings for central heating and domestic hot water applications. Vaillant ecoFIT pure 825 has a CH output of 19.1kW and a DHW output of 25.2kW.
What is the size of the Vaillant ecoFIT pure 825?

Its exact dimensions are 700x390x295mm (HxWxD). The compact size of the Vaillant ecoFIT pure 825 makes it easy to fit within a standard kitchen cupboard.
Vaillant ecoFIT pure 825 combi gas boiler Cost and Installation
The Vaillant ecoFIT Pure 825 installation cost, including fixtures and fittings, typically ranges between £1,707 and £2,207. To get the best gas boiler price, compare offers from local heating companies. Free quotes can be obtained from trusted platforms, connecting you with professional heating engineers in your area.
Warranty on the Vaillant ecoFIT pure 825 combi gas boiler
Vaillant offers a standard 2-year warranty on the ecoFIT Pure 825. However, this can be extended to 7-10 years when installed by a Vaillant Advance installer. With proper care, the life expectancy of a boiler like this one can extend to 15 years, making it a long-term investment for heating your home.
Vaillant reviews
Vaillant has a strong reputation among boiler manufacturers, with many models earning awards for quiet operation and receiving the Quiet Mark Accreditation. Their products are built to last, and with regular boiler installations, they continue to keep homes warm efficiently. Customers consistently rate Vaillant as a good combi boiler brand, with a Trustpilot score of 4.6 out of 5 from over 16,000 reviews.
FAQ
What type of boiler is a Vaillant ecoFIT pure?
- Vaillant’s ecoFIT pure series includes a range of boiler types, including combi, system, and regular boilers.
- They are all highly-efficient condensing boilers.
Is a Vaillant ecoFIT pure a combi boiler?
- Yes, the ecoFIT pure series includes three combi boiler models: ecoFIT pure 825, ecoFIT pure 830, and ecoFIT pure 835.
Is Vaillant a good combi boiler?
- Yes, Vaillant is considered a good brand for combi boilers.
- Their ecoTEC plus, ecoTEC Pro, ecoTEC Exclusive, and ecoFIT pure series are all highly-efficient with ratings between 92% and 94%. This helps save on energy costs and reduces environmental impact.
- Vaillant boilers also come with warranties, often extendable up to 10 years, providing peace of mind regarding reliability.
How long should Vaillant boilers last?
- The average lifespan of a boiler, including Vaillant, is 10 to 15 years.
- Regular annual servicing can help extend the boiler’s lifespan.
What is the most powerful Vaillant boiler?
- The ecoTEC plus 64kW system gas boiler is Vaillant’s most powerful model, with a central heating output of 64kW.
- However, it is designed for very large properties with high heating demands.
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“Enjoy reliable and energy-saving heating with the compact Vaillant ecoFIT Pure 825, designed for modern homes.”