Vaillant Ecotech 826 Combi Boiler with Horizontal Flue & 15mm Scale Reducer

The Vaillant ecoTEC Plus 826 Combi Boiler is a premium 26kW combination boiler designed to provide efficient central heating and instant mains-pressure hot water without the need for a separate hot water cylinder or cold water storage tank. Featuring Vaillant's latest condensing technology, intelligent combustion management, and a modern semi-touch interface, it delivers outstanding comfort, reliability, and energy efficiency for today's homes.

Ideal for apartments and small to medium-sized homes with one bathroom, the ecoTEC Plus 826 combines compact dimensions with powerful domestic hot water performance. Its smart connectivity, low modulation capability, and future-ready design make it an excellent choice for both new installations and boiler replacements.

Key Features

• 26kW combination (Combi) gas boiler
• Fuel Type: Natural Gas
• Instant hot water without a cylinder
• ErP A Rated for heating and hot water
• High-efficiency condensing technology
• Intuitive semi-touch user interface
• IoniDETECT intelligent combustion technology
• Up to 1:11 modulation ratio
• Domestic hot water flow rate: 12.4 L/min (Δ30°C)
• Domestic hot water flow rate: 10.6 L/min (Δ35°C)
• Hydrogen Blend Ready (up to 20%)
• Adaptive LPG compatible
• Smart home ready with myVAILLANT connect
• Stainless steel heat exchanger
• Compatible with Vaillant heating controls
• Standard 5-year manufacturer's warranty
• Extendable to 10 years when installed by a Vaillant Advance Installer (subject to terms and conditions).

Ideal for Small to Medium Homes

The ecoTEC Plus 826 is designed for small to medium-sized homes with one bathroom and moderate hot water demand. As a combi boiler, it delivers heating and hot water directly from the mains, eliminating the need for bulky cylinders or storage tanks.

Its compact design also makes it ideal for installation inside kitchen cupboards or utility rooms while maximising available living space.

Efficient Heating & Instant Hot Water

With a 26kW heating output and a domestic hot water flow rate of up to 12.4 litres per minute (Δ30°C), the ecoTEC Plus 826 provides fast, reliable hot water whenever it's needed.

Vaillant's advanced IoniDETECT technology continuously monitors combustion conditions and automatically adjusts burner performance for optimum efficiency. Combined with an impressive 1:11 modulation ratio, the boiler minimises gas consumption while maintaining excellent comfort levels.

Compact Design & Easy Installation

Designed with installers in mind, the ecoTEC Plus 826 retains Vaillant's familiar installation footprint while offering improved accessibility for servicing.

Dimensions

• Height: 720mm
• Width: 440mm
• Depth: 352mm

Its compact size makes it suitable for a wide variety of installation locations, including kitchen cupboards where space is limited.

Advanced Energy Efficiency

The ecoTEC Plus 826 combines intelligent combustion management with high-efficiency condensing technology to maximise seasonal efficiency and reduce household energy bills.

The boiler is also Hydrogen Blend Ready, allowing operation with gas supplies containing up to 20% hydrogen, helping future-proof your heating system as energy networks evolve.

Smart Heating Control Compatibility

Compatible with myVAILLANT connect and Vaillant's latest smart controls, the ecoTEC Plus 826 allows homeowners to monitor and adjust heating remotely using their smartphone.

Weather compensation and intelligent modulation help improve comfort while reducing energy consumption throughout the year.

Reliable Performance & Easy Maintenance

Featuring a durable stainless steel heat exchanger, adaptive LPG compatibility, and Vaillant's intelligent linBUS communication technology, the ecoTEC Plus 826 is built for long-term reliability.

Its redesigned internal layout and guided commissioning process make installation and servicing quicker and more convenient for heating engineers.

Warranty & Peace of Mind

The Vaillant ecoTEC Plus 826 includes a 5-year manufacturer's warranty as standard. When installed and registered by an eligible Vaillant Advance Installer, the warranty can be extended to 10 years, providing additional confidence and long-term protection.

Why Choose the Vaillant ecoTEC Plus 826?

• 26kW high-efficiency combi boiler
• Instant mains-pressure hot water
• No hot water cylinder required
• IoniDETECT intelligent combustion technology
• Up to 1:11 modulation ratio
• Hydrogen Blend Ready (20%)
• Adaptive LPG compatible
• Smart home ready
• Stainless steel heat exchanger
• Up to 10-year warranty available