The ecoTEC plus 620 System Boiler is a smart, high-efficiency heating solution that combines cutting-edge technology, innovation, and reliability. Hand-built in Vaillant's award-winning Derbyshire manufacturing plant, it offers intelligent performance, enhanced connectivity, and precision control for modern homes.

Why Choose a System Boiler?

System boilers deliver heating and hot water efficiently while requiring a hot water storage cylinder, making them ideal for larger homes with higher hot water demands. They don’t require a separate cold water tank, offering a compact yet powerful heating solution.

Features:

• Smart home ready – Works seamlessly with myVAILLANT connect for app control, smart home integration, and remote appliance support.
• Refined internal layout – Enhanced design allows for easy access to all components, making installation and servicing effortless.
• Familiar footprint & external layout – Retains the same case dimensions, flue position, and pipe connections for a simple like-for-like swap.
• New intuitive semi-touch interface – Provides an effortless setup experience with a guided commissioning wizard and easy-to-follow navigation.
• Automatic LPG conversion – Converts to LPG in minutes, with no additional parts required.
• New IoniDETECT technology – Intelligent gas combustion monitoring for a wider modulation range of 1:8, ensuring greater efficiency and lower energy consumption.
• Sharpened intelligence with LINbus technology – Enhances flow rate and pressure monitoring via the internal pump, leading to improved system performance.

Technical data:

• Brand - Vaillant
• Range - ecoTEC Plus
• Product Type - 625 System Boiler
• ErP Rating - A
• Wattage - 25kW
• Depth - 352mm
• Width - 440mm
• Height - 720mm
• Weight - 36kg
• Heat Exchanger Material - Stainless Steel
• Mounting - Wall Mounted
• Nominal Heat Output Range At 50°C To 30°C (Condensing mode) - 3.9-26.5kW
• Nominal Heat Output Range At 80°C To 60°C (Non condensing mode) - 3.5-24.9kW
• Maximum Flow Temperature - 85°C
• Flow Temperature Range - 30°C To 85°C
• Flow Temperature Factory Setting - 75°C
• Modulation - 1:8 max/min
• Maximum Heat Output For Water Generation - 29.6kW
• Gas Inlet Connection (Pipe Size) - 15mm
• Heating Flow And Return Connections (Pipe Size) - 22mm
• Filling Loop Supplied - No
• NOx (En 15502-2-1) - 27.0mg/kWh
• ErP Efficiency - 94%
• ErP Decibel Rating (Sound Power) - 46dB(A)
• Maximum Horizontal Flue Length 60/100 - 8mtr
• Maximum Vertical Flue Length 60/100 - 8mtr
• Maximum Horizontal Flue Length 80/125 - 28mtr
• Maximum Vertical Length 80/125 - 30mtr
• Permissible Flue Classifications - C13, C33, C43, C53