The Vaillant ecoFIT pro is a compact series of combi HR boilers equipped with a robust aluminium heat exchanger. This ecoFIT pro VUW 306/6-3 (L-NL) comes with a CW4 class 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 aluminium alloy, which minimizes corrosion and contamination. The heat exchanger can be quickly opened and easily cleaned with water, without the need for brushes. A smart design ensures flawless installation of the gasket 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 withstood durability tests with pressures up to 30 bar. Torsional forces during installation are prevented by the anchoring in the fiberglass-reinforced base plate. The safety siphon can be visually inspected, disassembled for cleaning in a flash, and does not need to be refilled due to the unique closing mechanism.
Easy Installation
The ecoFIT pro has a very compact size (suitable for kitchen installations) and is therefore easy to place. 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 | 0010029557 |
| EAN Code | 4024074874127 |
| Discount Group | 016 |
| Width | 390 mm |
| Height | 700 mm |
| Depth | 280 mm |
| Supply Voltage | 230 V |
| Number of Phases | 1 |
| Material Quality | Other |
| Flow Connection | Compression |
| Return Connection | Compression |
| Nominal Voltage | 230 V |
| Frequency | 50 Hz |
| Closed Construction | Yes |
| Nom. Hot Water Output | 29.1 kW |
| Nom. Upper Limit Hot Water Load | 33 kW |
| Nom. Lower Limit Hot Water Load | 29.7 kW |
| Energy Efficiency of Water Heating (Nwh) | 85 % |
| SEER (Ns) at Average Conditions | 94 |
| SEER (Ns) at Colder Conditions | 99.1 |
| SEER (Ns) at Warmer Conditions | 89.1 |
| Capacity Profile | XL |
| Energy Efficiency Class Heating | A |
| Energy Efficiency Class Water Heating | A |
| Nom. Hot Water Diameter | 1/2" (15) |
| Additional Power Consumption at Full Load (ELmax) | 0.023 kW |
| Useful Heat Output at Nominal Heat Output and Operation at High Temperature (P4) | 25.2 kW |
| Useful Efficiency at Nominal Heat Output and Operation at High Temperature (n4) | 89.1 % |
| Additional Power Consumption in Standby Mode (Psb) | 0.002 kW |
| Standby Heat Loss (Pstby) | 0.05 kW |
| With Built-in Economiser | No |
| Energy Efficiency Heating | 94 % |
| Max. Hydrogen Percentage for Mixing with Natural Gas | 0 % |
| Suitable for Low Calorific Natural Gas | Standard Factory Setting |
| Suitable for High Calorific Natural Gas | Manually Adjustable |
| Suitable for Propane | Not Suitable |
| Suitable for Butane | Not Suitable |
| Suitable for Methane | Not Suitable |
| Suitable for LPG | Not Suitable |
| Suitable for Hydrogen | Not Suitable |
| Energy Efficiency Class Heating (811/2013/EU) | A |
| Energy Efficiency Class Water Heating (811/2013/EU) | A |
| Nom. Load | 6.8 - 28.3 kW |
| Gas Supply Pressure | 17 - 30 mbar |
| Nom. Hot Water Load | 6.8 - 33 kW |
| ηs, h (Seasonal Energy Efficiency for Heating) | 94 % |
| Heat Exchanger Material | Aluminium |
| Adjustable Heating Capacity | Yes |
| Nom. Cold Water Diameter | 1/2" (15) |
| Water Flow Threshold | 1.5 l/min |
| Built-in Pump Switch | Yes |
| Gas Certification VR/SV | No |
| Gas Certification NZ | Yes |
| CW Label | 4 |
| Nom. Lower Limit Load | 25.5 kW |
| Nom. Upper Limit Load | 28.3 kW |
| Min. Operating Pressure | 0.8 bar |
| Min. Return Temperature | 1 °C |
| Max. Gas Supply Pressure | 30 mbar |
| Hot Water Capacity at 60 °C | 7.5 l/min |
| Built-in Weather Dependent Controller | No |
| Built-in Expansion Vessel | No |
| Water Resistance at dT 20 °C | 25 kPa |
| Nom. Output 80-60 °C | 25 kW |
| Max. Flow Temperature (Operating Temperature) | 83 °C |
| Max. Operating Pressure | 3 bar |
| Built-in Fill/Drain Valve | No |
| Built-in Pressure Relief Valve | No |
| External Pipe Diameter Flow | 22 mm |
| External Pipe Diameter Return | 22 mm |
| Fuel Connection | Compression |
| External Pipe Diameter Fuel | 15 mm |
| Air Supply Connection | Socket |
| Nom. Air Supply Channel Diameter | 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 Certification VR | No |
| Cold Water Connection | Compression |
| Hot Water Connection | Compression |
| Nom. Flue Gas Channel Diameter | 80 mm |
| Burner Control High/Low | No |
| Modulating Burner Control | Yes |
| Built-in Manometer | No |
| Gas Certification 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 Construction (Air Supply) Possible | Yes |
| Nom. 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 |
| Nom. Flow Diameter | 3/4" (20) |
| Nom. Return Diameter | 3/4" (20) |
| Nom. Fuel Diameter | 1/2" (15) |
| Hot Water Storage | 1 l |
| Nom. Condensate Diameter | 1" (25) |
| Operating Pressure | 0.3 - 3 bar |
| Built-in Inlet Combination | No |
| CW Label | 4 |
| Gas Certification HR | Yes |
| Gas Certification NZ | Yes |
