The ecoTEC classic is the basic heating boiler in the Vaillant range. This device combines German quality with efficiency, providing basic comfort for your home. The ecoTEC classic VHR 28-34/5-3 has a CW5 class and delivers 15.8 liters of hot water (40°C) per minute.
Energy Efficient
The ecoTEC classic carries an energy label A for both heating and domestic hot water. The modulation range is 1:4. The partial load can be automatically adjusted and adapts throughout the year according to the seasons. This modulation range ensures even heating, allowing for gas savings.
Future-Proof
The ecoTEC classic is hybrid-ready; the heating system can be extended with a heat pump. This allows you to use renewable energy sources, heating more efficiently than ever. Additionally, you save on energy costs and heat your home sustainably.
Available Thermostats
The following thermostats are compatible with the Vaillant ecoTEC plus:
Management or remote control is possible with the optional sensoNET gateway in combination with the sensoAPP.
Technical Specifications
| Feature | Value |
|---|---|
| Brand | Vaillant |
| Supplier Code | 0010025034 |
| EAN Code | 4024074850251 |
| Discount Group | 016 |
| Width | 440 mm |
| Height | 720 mm |
| Depth | 372 mm |
| Supply Voltage | 230 V |
| Number of Phases | 1 |
| Material Quality | Other |
| Inlet Connection | Compression |
| Return Connection | Compression |
| Nominal Voltage | 190 - 253 V |
| Frequency | 50 Hz |
| Closed Version | Yes |
| Nominal Hot Water Output | 28.1 kW |
| Nominal Upper Hot Water Load | 39 kW |
| Nominal Lower Hot Water Load | 35.1 kW |
| Energy Efficiency for Water Heating (Nwh) | 87% |
| SEER (Ns) under Average Conditions | 92 |
| SEER (Ns) under Colder Conditions | 97.2 |
| SEER (Ns) under Warmer Conditions | 87.8 |
| Capacity Profile | XL |
| Energy Efficiency Class for Space Heating | A |
| Energy Efficiency Class for Water Heating | A |
| Nominal Diameter Hot Water | 1/2" (15) |
| Additional Power Consumption at Full Load (ELmax) | 0.04 kW |
| Useful Heat Output at Nominal Heat Output and High-Temperature Operation (P4) | 28.2 kW |
| Useful Efficiency at Nominal Heat Output and High-Temperature Operation (n4) | 87.8% |
| Additional Power Consumption in Standby Mode (Psb) | 0 kW |
| Standby Heat Loss (Pstby) | 0.07 kW |
| Built-in Economizer | No |
| Max. Hydrogen Mix with Natural Gas | 0% |
| Suitable for Low Calorific Value Natural Gas | Standard Factory Setting |
| Suitable for High Calorific Value Natural Gas | Manually Adjustable |
| Suitable for Propane | Requires Conversion Kit (not included) |
| 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 | 9.4 - 32.1 kW |
| Gas Pressure | 17 - 30 mbar |
| Nominal Load for Hot Water | 9.4 - 36.7 kW |
| ηs, h (Seasonal Energy Efficiency for Space Heating) | 92% |
| Heat Exchanger Material | Stainless Steel (SS) |
| Adjustable Heating Power | Yes |
| Nominal Diameter Cold Water | 1/2" (15) |
| Hot Water Flow Threshold | 1.5 l/min |
| Built-in Pump Control | Yes |
| Gas Certification VR/SV | Yes |
| Gas Certification NZ | Yes |
| CW Label | 5 |
| Nominal Lower Load | 28.9 kW |
| Nominal Upper Load | 32.1 kW |
| Min. Operating Pressure | 0.3 bar |
| Min. Return Temperature | 1°C |
| Max. Gas Supply Pressure | 30 mbar |
| Hot Water Capacity at 60°C | 9.5 l/min |
| Built-in Weather-Dependent Regulator | No |
| Built-in Expansion Vessel | No |
| Nominal Power 80-60°C | 28 kW |
| Max. Inlet Temperature (Operating Temperature) | 85°C |
| Built-in Fill/Drain Valve | No |
| Built-in Pressure Relief Valve | No |
| External Pipe Diameter Inlet | 22 mm |
| External Pipe Diameter Return | 22 mm |
| Fuel Connection | Compression |
| External Pipe Diameter Fuel | 15 mm |
| Air Supply Connection | Sleeve |
| Nominal Channel Diameter Air Supply | 80 mm |
| Flue Gas Outlet Connection | Sleeve |
| 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 Pressure | 20 mbar |
| Suitable for Natural Gas | Yes |
| Gas Certification VR | No |
| Cold Water Connection | Compression |
| Hot Water Connection | Compression |
| Nominal Channel Diameter Flue Gas Outlet | 80 mm |
| Burner Control High/Low | No |
| Burner Control Modulating | Yes |
| Built-in Manometer | Yes |
| Gas Certification 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 |
| Control Signal OpenTherm | No |
| Operation as Open Version (Air Supply) Possible | Yes |
| Nominal Power 50-30°C | 29.7 kW |
| Suitable for Propane | Yes |
| Suitable for Butane | No |
| Suitable for Methane | Yes |
| Max. Allowed Operating Pressure | 3 bar |
| Nominal Diameter Inlet | 3/4" (20) |
| Nominal Diameter Return | 3/4" (20) |
| Nominal Diameter Fuel | 1/2" (15) |
| Hot Water Stock | 1 l |
| Nominal Diameter Condensate | DN 20 |
| Conversion Kit Required | Yes |
| Operating Pressure | 0.3 - 3 bar |
| Built-in Inlet Combination | No |
| Expansion Connection | Other |
| CW Label | 5 |
| Gas Certification HR | Yes |
| Gas Certification NZ | Yes |
