The Vaillant ecoFIT pro is a compact series of combination HR boilers equipped with a robust aluminum heat exchanger. This ecoFIT pro VUW 356/6-3 (L-NL) is fitted with a CW5 class and delivers 15.7 liters of hot water (40°C) per minute.
Advanced Heat Exchanger
The heat exchanger is made of a self-protecting, sand-cast aluminum alloy, which minimizes corrosion and contamination. The heat exchanger is quick to open and easy to clean with water, without the use of brushes. A smart design ensures flawless gasket installation 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 undergone 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 quickly for cleaning, and, thanks to the unique locking mechanism, does not need to be refilled.
Easy Installation
The ecoFIT pro has a very compact size (suitable for kitchen installation), making it easy to position. 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 | 0010029558 |
| EAN Code | 4024074874134 |
| Discount Group | 016 |
| Width | 390 mm |
| Height | 700 mm |
| Depth | 280 mm |
| Supply Voltage | 230 V |
| Number of Phases | 1 |
| Material Quality | Other |
| Supply Connection | Compression |
| Return Connection | Compression |
| Nominal Voltage | 230 - 230 V |
| Frequency | 50 Hz |
| Closed Design | Yes |
| Nominal Hot Water Power | 35 kW |
| Nominal Upper Limit Hot Water Load | 39.7 kW |
| Nominal Lower Limit Hot Water Load | 35.7 kW |
| Energy Efficiency of Water Heating (Nwh) | 86% |
| SEER (Ns) in Average Conditions | 94 |
| SEER (Ns) in Colder Conditions | 98.9 |
| SEER (Ns) in Warmer Conditions | 89.3 |
| Capacity Profile | XL |
| Energy Efficiency Class for Space Heating | A |
| Energy Efficiency Class for Water Heating | A |
| Nominal Diameter for Hot Water | 1/2" (15) |
| Additional Electricity Consumption at Full Load (ELmax) | 0.037 kW |
| Useful Heat Output at Nominal Heat Output and High-Temperature Operation (P4) | 30.3 kW |
| Useful Efficiency at Nominal Heat Output and High-Temperature Operation (n4) | 89.3% |
| Additional 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% |
| Maximum Hydrogen Content for 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 | 7.9 - 34 kW |
| Gas Supply Pressure | 17 - 30 mbar |
| Nominal Load for Hot Water | 7.9 - 39.7 kW |
| ηs, h (Seasonal Energy Efficiency for Space Heating) | 94% |
| Heat Exchanger Material | Aluminum |
| Adjustable Heating Power | Yes |
| Nominal Diameter for Cold Water | 1/2" (15) |
| Hot Water Threshold | 1.5 l/min |
| Built-in Pump Switch | Yes |
| Gas Approval VR/SV | No |
| Gas Approval NZ | Yes |
| CW Label | 5 |
| Nominal Lower Load | 30.6 kW |
| Nominal Upper Load | 34 kW |
| Min. Operating Pressure | 0.8 bar |
| Min. Return Temperature | 1°C |
| Max. Gas Supply Pressure | 30 mbar |
| Hot Water Capacity at 60°C | 9.4 l/min |
| Built-in Weather Dependent Control | No |
| Built-in Expansion Vessel | No |
| Water Resistance at ΔT 20°C | 25 kPa |
| Nominal Power at 80-60°C | 30 kW |
| Max. Supply Temperature (Operating Temperature) | 83°C |
| Max. Operating Pressure | 3 bar |
| Built-in Fill/Drain Valve | No |
| Built-in Overpressure Valve | No |
| Outer Pipe Diameter for Supply | 22 mm |
| Outer Pipe Diameter for Return | 22 mm |
| Fuel Connection | Compression |
| Outer Pipe Diameter for Fuel | 15 mm |
| Air Supply Connection | Socket |
| Nominal Pipe Diameter for Air Supply | 80 mm |
| Flue Gas Outlet Connection | Socket |
| Outer Pipe Diameter for Cold Water | 15 mm |
| Outer Pipe Diameter for Hot Water | 15 mm |
| Condensate Connection | Flexible |
| Outer Pipe Diameter for 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 Pipe Diameter for Flue Gas Outlet | 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 | No |
| Control Signal 0-10V | No |
| Open Operation Possible (Air Supply) | Yes |
| Nominal Power at 50-30°C | 31.8 kW |
| Suitable for Propane | No |
| Suitable for Butane | No |
| Suitable for Methane | No |
| Max. Allowable Operating Pressure | 3 bar |
| Nominal Diameter for Supply | 3/4" (20) |
| Nominal Diameter for Return | 3/4" (20) |
| Nominal Diameter for Fuel | 1/2" (15) |
| Hot Water Storage | 1 l |
| Nominal Diameter for Condensate | 1" (25) |
| Operating Pressure | 0.3 - 3 bar |
| Built-in Inlet Combination | No |
| CW Label | 5 |
| Gas Approval HR | Yes |
| Gas Approval NZ | Yes |
