The ecoTEC classic is the basic HR boiler in the Vaillant range. This unit combines German quality with energy efficiency, providing the essential comfort for your household. The ecoTEC classic VHR 18-24/5-3 EXP is equipped with a built-in expansion vessel, has a CW3 class, and delivers 11 liters of hot water (40°C) per minute.
The ecoTEC classic carries the energy efficiency label A for both heating and hot water. The modulation range is 1:4. The partial load can be automatically adjusted, adapting to the seasons throughout the year. This modulation range ensures even heating and helps reduce gas consumption.
The ecoTEC classic is hybrid-ready; the heating system can be extended with a heat pump. This way, you can use renewable energy sources and heat your home more efficiently than ever before. Additionally, you will save on energy costs while heating your home in a sustainable manner.
The following thermostats are suitable for the Vaillant ecoTEC classic:
Management or remote control is possible with the optional sensoNET Gateway in combination with the sensoAPP.
| Feature | Value |
|---|---|
| Brand | Vaillant |
| Supplier Code | 0010025032 |
| EAN Code | 4024074850237 |
| Discount Group | 016 |
| Width | 440 mm |
| Height | 720 mm |
| Depth | 335 mm |
| Supply Voltage | 230 V |
| Number of Phases | 1 |
| Flow Connection | Compression |
| Return Connection | Compression |
| Nominal Voltage | 190 - 253 V |
| Frequency | 50 Hz |
| Closed Design | Yes |
| Nominal Hot Water Output | 24.1 kW |
| Nominal Maximum Hot Water Load | 26.3 kW |
| Nominal Minimum Hot Water Load | 23.7 kW |
| Energy Efficiency of Hot Water Heating (Nwh) | 84 % |
| SEER (Ns) under average conditions | 92 |
| SEER (Ns) under colder conditions | 97.9 |
| SEER (Ns) under warmer conditions | 86.9 |
| Capacity Profile | XL |
| Energy Efficiency Class for Space Heating | A |
| Energy Efficiency Class for Water Heating | A |
| Nominal Hot Water Diameter | 1/2" (15) |
| Additional Power Consumption at Full Load (ELmax) | 0.03 kW |
| Useful Heat Output at Nominal Output and Operation at High Temperature (P4) | 18.5 kW |
| Useful Efficiency at Nominal Output and Operation at High Temperature (n4) | 86.9 % |
| Additional Power Consumption in Standby Mode (Psb) | 0 kW |
| Standby Heat Loss (Pstby) | 0.06 kW |
| With Built-in Economizer | No |
| Energy Efficiency for Space Heating | 93 % |
| Maximum Hydrogen Content for Mixing 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 | With 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 Range | 6.1 - 21.2 kW |
| Gas Supply Pressure | 17 - 30 mbar |
| Nominal Load for Hot Water | 6.1 - 26.3 kW |
| ηs, h (Seasonal Energy Efficiency for Space Heating) | 92 % |
| Material of Heat Exchanger | Stainless Steel (V2A) |
| Adjustable Heating Output | Yes |
| Nominal Diameter Cold Water | 1/2" (15) |
| Water Flow Threshold | 1.5 l/min |
| Built-in Pump Switching | Yes |
| Gas Certification VR/SV | Yes |
| Gas Certification NZ | Yes |
| CW Label | 3 |
| Nominal Minimum Load | 19.1 kW |
| Nominal Maximum Load | 21.2 kW |
| Minimum Operating Pressure | 0.3 bar |
| Minimum Return Temperature | 1°C |
| Maximum Gas Supply Pressure | 30 mbar |
| Hot Water Capacity at 60°C | 6.6 l/min |
| Built-in Weather Dependent Controller | No |
| Built-in Expansion Vessel | Yes |
| Nominal Heating Power 80-60°C | 18.5 kW |
| Maximum Flow Temperature (Operating Temperature) | 85°C |
| Built-in Fill/Drain Valve | No |
| Built-in Overpressure Valve | No |
| External Pipe Diameter Supply | 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 |
| Minimum Gas Supply 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 |
| Modulating Burner Control | 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 | 19.9 kW |
| Suitable for Propane | Yes |
| Suitable for Butane | No |
| Suitable for Methane | Yes |
| Maximum Allowable Operating Pressure | 3 bar |
| Nominal Diameter Supply | 3/4" (20) |
| Nominal Diameter Return | 3/4" (20) |
| Nominal Diameter Fuel | 1/2" (15) |
| Hot Water Storage | 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 |
