The Vaillant ecoFIT pro is a compact series of combi HR boilers equipped with a robust aluminum heat exchanger. The ecoFIT pro VUW 306/6-3 (L-NL) has a CW4 rating, comes with a built-in expansion vessel, and delivers 12.5 liters of hot water (40°C) per minute.
Advanced Heat Exchanger
The heat exchanger is made from a self-protecting, sand-cast aluminum alloy, which minimizes corrosion and contamination. The heat exchanger is quick to open and can easily be cleaned with water, without the need for brushes. A smart design ensures flawless gasket assembly and a perfect seal without the use of a torque wrench.
High-Quality Components
The ecoFIT pro is equipped with high-quality components. The hydroblock has passed durability tests with pressures up to 30 bar. Torsional forces during assembly are prevented by the anchoring in the fiberglass-reinforced base plate. The safety siphon can be visually inspected directly, is easy to disassemble for cleaning, and does not need to be filled due to its unique sealing mechanism.
Easy Installation
The ecoFIT pro has a very compact size (suitable for kitchen installation) and can therefore be easily installed. All components are accessible from the front and can be easily replaced during maintenance.
Available Thermostats
The following thermostats are compatible with the Vaillant ecoTEC plus:
Technical Specifications
| Feature | Value |
|---|---|
| Brand | Vaillant |
| Supplier Code | 0010029560 |
| EAN Code | 4024074874158 |
| Discount Group | 016 |
| Width | 390 mm |
| Height | 700 mm |
| Depth | 280 mm |
| Power Supply | 230 V |
| Number of Phases | 1 |
| Material Quality | Other |
| Flow Connection | Compression |
| Return Connection | Compression |
| Nominal Voltage | 230 V |
| Frequency | 50 Hz |
| Closed Version | Yes |
| Nominal Domestic Hot Water Output | 29.1 kW |
| Nominal Upper Domestic Hot Water Load | 33 kW |
| Nominal Lower Domestic Hot Water Load | 29.7 kW |
| Energy Efficiency of Water Heating (Nwh) | 85% |
| SEER (Ns) at Average Conditions | 94 |
| SEER (Ns) at Cooler Conditions | 99.1 |
| SEER (Ns) at Warmer Conditions | 89.1 |
| Capacity Profile | XL |
| Energy Efficiency Class for Space Heating | A |
| Energy Efficiency Class for Water Heating | A |
| Nominal Diameter Hot Water | 1/2" (15) |
| Supplementary Electricity Consumption at Full Load (ELmax) | 0.023 kW |
| Useful Heat Output at Nominal Output and Operation at High Temperature (P4) | 25.2 kW |
| Efficiency at Nominal Output and Operation at High Temperature (n4) | 89.1% |
| Supplementary Electricity Consumption in Standby Mode (Psb) | 0.002 kW |
| Standby Heat Loss (Pstby) | 0.05 kW |
| Built-in Economizer | No |
| Energy Efficiency for Space Heating | 94% |
| Max Hydrogen Content in Mixture with NAT Gas | 0% |
| Suitable for Low Calorific Value Natural Gas | Standard factory setting |
| Suitable for High Calorific Value Natural Gas | Manually adjustable |
| Suitable for Propane | Manually adjustable |
| Suitable for Butane | Not suitable |
| Suitable for Methane | Not suitable |
| Suitable for LPG | Not suitable |
| Suitable for Hydrogen | Not suitable |
| Energy Efficiency Class for Space Heating (811/2013/EU) | A |
| Energy Efficiency Class for Water Heating (811/2013/EU) | A |
| Nominal Load | 6.8 - 28.3 kW |
| Gas Supply Pressure | 17 - 30 mbar |
| Nominal Domestic Hot Water Load | 6.8 - 33 kW |
| ηs, h (Seasonal Energy Efficiency for Space Heating) | 94% |
| Material of Heat Exchanger | Aluminum |
| Adjustable Heating Power | Yes |
| Nominal Diameter Cold Water | 1/2" (15) |
| Water Temperature Threshold | 1.5 l/min |
| Built-in Pump Switching | Yes |
| Gas Approval VR/SV | No |
| Gas Approval NZ | Yes |
| CW Label | 4 |
| Nominal Lower Load | 25.5 kW |
| Nominal Upper Load | 28.3 kW |
| Min. Operating Pressure | 0.8 bar |
| Min. Return Temperature | 1°C |
| Max. Gas Supply Pressure | 30 mbar |
| Domestic Hot Water Capacity at 60°C | 7.5 l/min |
| Built-in Weather-Dependent Controller | No |
| Built-in Expansion Vessel | Yes |
| Water-Side Resistance at ΔT 20°C | 25 kPa |
| Nominal Output 80-60°C | 25 kW |
| Max. Supply Temperature (Operating Temperature) | 83°C |
| Max. Operating Pressure | 3 bar |
| Built-in Fill/Drain Valve | No |
| Built-in Pressure Relief Valve | Yes |
| External Pipe Diameter Supply | 22 mm |
| External Pipe Diameter Return | 22 mm |
| Fuel Connection | Compression |
| External Pipe Diameter Fuel | 15 mm |
| Air Supply Connection | Socket |
| Nominal Channel Diameter Air Supply | 80 mm |
| Flue Gas Connection | Socket |
| External Pipe Diameter Cold Water | 15 mm |
| External Pipe Diameter Hot Water | 15 mm |
| Condensate Connection | Flexible |
| External Pipe Diameter Condensate | 25 mm |
| Min. Gas Supply Pressure | 20 mbar |
| Suitable for Natural Gas | Yes |
| Gas Approval VR | No |
| Cold Water Connection | Compression |
| Hot Water Connection | Compression |
| Nominal Flue Gas Channel Diameter | 80 mm |
| Burner Control High/Low | No |
| Modulating Burner Control | Yes |
| Built-in Manometer | No |
| Gas Approval HR | Yes |
| Efficiency | 107% |
| Pilot Flame | No |
| Second Return Connection | No |
| Control Signal On/Off | Yes |
| Control Signal High/Low | Yes |
| Control Signal 0-10V | No |
| Control Signal OpenTherm | No |
| Operation as Open Version (Air Supply) Possible | Yes |
| Nominal Output 50-30°C | 26.5 kW |
| Suitable for Propane | No |
| Suitable for Butane | No |
| Suitable for Methane | No |
| Max. Permissible Operating Pressure | 3 bar |
| Nominal Diameter Supply | 3/4" (20) |
| Nominal Diameter Return | 3/4" (20) |
| Nominal Diameter Fuel | 1/2" (15) |
| Hot Water Reserve | 1 l |
| Nominal Diameter Condensate | 1" (25) |
| Operating Pressure | 0.3 - 3 bar |
| Built-in Inlet Combination | No |
| Expansion Connection | Other |
| CW Label | 4 |
| Gas Approval HR | Yes |
| Gas Approval NZ | Yes |
