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The Vaillant ecoFIT pro is a compact series of combination gas condensing boilers equipped with a robust aluminum heat exchanger. The ecoFIT pro VUW 306/6-3 (L-NL) is rated CW4 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. It can be quickly opened and easily cleaned with water, without the need for brushes. A smart design ensures correct sealing of the gasket and perfect sealing without the use of a torque wrench.
High-Quality Components
The ecoFIT pro is equipped with high-quality components. The hydroblock has withstood pressure tests up to 30 bar. Torsional forces during installation are prevented by anchoring in the fiberglass-reinforced base plate. The safety siphon is visually inspectable, can be easily disassembled for cleaning, and, due to the unique closing mechanism, does not need to be filled.
Easy Installation
The ecoFIT pro has a very compact size (suitable for kitchen installation) and is easy to place. All components are accessible from the front and can be easily replaced during maintenance.
Available Thermostats
The following thermostats are suitable for the Vaillant ecoTEC plus:
Technical Specifications:
| Feature | Value |
|---|---|
| Brand | Vaillant |
| Supplier Code | 0010029557 |
| EAN Code | 4024074874127 |
| Width | 390 mm |
| Height | 700 mm |
| Depth | 280 mm |
| Supply Voltage | 230 V |
| Number of Phases | 1 |
| Material Quality | Other |
| Supply Connection | Compression fitting |
| Return Connection | Compression fitting |
| Nominal Voltage | 230 - 230 V |
| Frequency | 50 Hz |
| Closed Version | Yes |
| Nominal Domestic Hot Water Output | 29.1 kW |
| Nominal Maximum Domestic Hot Water Load | 33 kW |
| Nominal Minimum Domestic 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 for Space Heating | A |
| Energy Efficiency Class for Water Heating | A |
| Nominal Diameter of Hot Water Outlet | 1/2" (15) |
| Supplementary 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 % |
| Supplementary Power Consumption in Standby Mode (Psb) | 0.002 kW |
| Standby Heat Loss (Pstby) | 0.05 kW |
| With Built-in Economizer | No |
| Energy Efficiency for Space Heating | 94 % |
| Max. Hydrogen Percentage in Natural Gas Mixture | 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 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 Inlet | 1/2" (15) |
| Hot Water Flow Threshold | 1.5 l/min |
| Built-in Pump Switching | Yes |
| Gas Certification VR/SV | No |
| Gas Certification NZ | Yes |
| CW Label | 4 |
| Nominal Minimum Load | 25.5 kW |
| Nominal Maximum 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 |
| Hydraulic Resistance at ΔT 20°C | 25 kPa |
| Nominal Heat Output at 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 (Supply) | 22 mm |
| External Pipe Diameter (Return) | 22 mm |
| Fuel Connection | Compression fitting |
| External Pipe Diameter (Fuel) | 15 mm |
| Air Supply Connection | Socket |
| Nominal Air Supply Pipe Diameter | 80 mm |
| Flue Gas Outlet 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 Inlet Connection | Compression fitting |
| Hot Water Outlet Connection | Compression fitting |
| Nominal Flue Gas Pipe 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 |
| Open Installation (Air Supply) Possible | Yes |
| Nominal Heat Output at 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 |
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