Vaillant ecoFIT Pure 425 Open Vented Boiler 25kW

The Vaillant ecoFIT Pure 425 Open Vented Boiler 25kW is a natural gas open vented boiler designed for traditional heating systems with a hot water cylinder and a separate cold water storage tank. It is a suitable replacement option for older heat-only boilers, offering efficient condensing performance while retaining the familiar open-vented system layout. The compact wall-mounted design, aluminium heat exchanger and Vaillant control compatibility help provide dependable heating performance with flexible installation options.

Features & Benefits:

• Compact, cupboard-fit solution - Small footprint allows flexible siting, including inside kitchen cupboards
• Top and rear flue options - Provides greater installation flexibility for various property types
• Ultra-quiet operation - Quiet Mark certified for minimal noise disruption
• High-spec aluminium heat exchanger –ltrightweight, durable, and designed for long-lasting efficiency
• Automatic purging assistance - Simplifies installation and maintenance
• ClearltrED display - Ensures easy operation, even in dimly lit areas
• Easy maintenance - All components are accessible from the boiler front for quick servicing
• Recognisable Vaillant fault codes - Simplifies fault diagnosis for fast repairs
• Industry-leading flue lengths - Up to 10mtr flue length across all ecoFIT pure outputs for versatile siting
• 4-sided cooling and water agitation - Reduces stress on the heat exchanger for greater reliability and lower maintenance costs
• Compatible with Vaillant smart controls - Optimises energy efficiency and convenience, reducing energy bills
• ErP ‘A’ rated - High efficiency for heating and hot water, reducing energy costs
• Compact, cupboard-fit solution - Small footprint allows flexible siting, including inside kitchen cupboards
• Top and rear flue options - Provides greater installation flexibility for various property types
• Ultra-quiet operation - Quiet Mark certified for minimal noise disruption
• High-spec aluminium heat exchanger –ltrightweight, durable, and designed for long-lasting efficiency
• Automatic purging assistance - Simplifies installation and maintenance
• ClearltrED display - Ensures easy operation, even in dimly lit areas
• Easy maintenance - All components are accessible from the boiler front for quick servicing
• Recognisable Vaillant fault codes - Simplifies fault diagnosis for fast repairs
• Industry-leading flue lengths - Up to 10mtr flue length across all ecoFIT pure outputs for versatile siting
• 4-sided cooling and water agitation - Reduces stress on the heat exchanger for greater reliability and lower maintenance costs
• Compatible with Vaillant smart controls - Optimises energy efficiency and convenience, reducing energy bills
• ErP ‘A’ rated - High efficiency for heating and hot water, reducing energy costs

Applications:

• Traditional open-vented heating systems
• Homes with a hot water cylinder and cold water storage tank
• Heat-only boiler replacement projects

Technical Data:

• Brand - Vaillant
• Range - ecoFIT Pure
• Product Type - Natural Gas Open Vented Boiler
• Colour - White
• Fuel Type - Gas
• ErP Rating - A
• Wattage - 25kW
• Depth - 295mm
• Width - 375mm
• Height - 600mm
• Weight - 22kg
• Material - Aluminium
• Sound Power Level - 52dB(A)
• Manufacturer Guarantee - 2 Years
• Mounting - Wall Mounted
• Nominal Heat Output Range At 50°C To 30°C - 6.4-26.5kW
• Nominal Heat Output Range At 80°C To 60°C - 6.1-25.4kW
• Maximum Flow Temperature - 80°C
• Flow Temperature Range - 10°C To 80°C
• Approximate Condensate Volume At 50°C To 30°C - 2.55ltr/hr
• Modulation - 1:4.9 max/min
• Maximum Heat Output For Water Generation - 30kW
• Lowest Water Pressure To Operate Boiler - 0.3Bar
• Gas Inlet Connection (Pipe Size) - 15mm
• Heating Flow And Return Connections (Pipe Size) - 22mm
• Hot And Cold Water Connections (Pipe Size) - 15mm
• NOx Class - 5
• NOx (EN 15502-2-1) - 39mg/kWh
• ErP Efficiency - 94%
• Maximum Horizontal Flue Length 60/100 - 10mtr
• Maximum Vertical Flue Length 60/100 - 10mtr
• Maximum Horizontal Flue Length 80/125 - 25mtr
• Maximum Vertical Length 80/125 - 25mtr

Guarantee Options:

• 2-year standard guarantee out of the box
• 10-year extended guarantee when installed by a Vaillant Advance installer with an Advance boiler protection kit

Choose the Vaillant ecoFIT Pure 425 Open Vented Boiler 25kW for efficient Vaillant heating performance and reliable installation, available now online or at our London shops.