Gas boiler Vaillant condensing value ecoTEC plus VC/VCW/VCI 1-5

2025-04-16T12:25:22+02:00

Vendor: Vaillant
Type: Gas condensing boiler
Price: 3883.50 - 6388.00 (9 variants)

Vaillant condensing gas boiler

Vaillant ecoTEC plus VC/VCW/VCI 1-5 gas condensing boiler

The ecoTEC plus VC/VCW/VCI 1-5 is the ideal gas condensing boiler for single-family and multi-family homes. It can also be combined with a heat pump to create a sustainable hybrid system.

Hydrogen and biogas were also taken into consideration.

Since gas will continue to play an important role as a bridging technology in a future with sustainable energies, our ecoTEC plus is prepared for all eventualities. This innovative gas condensing boiler is already suitable for operation with up to 20% hydrogen or up to 100% biogas. Furthermore, it will be compatible with other fuels at a later date. Convertible to operation with 100% hydrogen* and thus fulfills the current H2 Ready-Requirements of the Building Energy Act (GEG). The necessary retrofit kit will be available from 2026. You can find more information on hydrogen here. here.

Technology that thinks for itself

Our innovative IoniDetect combustion control system ensures exceptionally reliable and efficient operation. The secret: The technology automatically detects different types and qualities of natural gas, continuously optimizing the condensing gas boiler. This means you're perfectly prepared for the upcoming conversion from L-gas to H-gas in some parts of Germany.

Everywhere at home

The Vaillant ecoTEC plus condensing gas boiler is not only ideal for single-family homes: it can also be used as a floor heating system in multi-family homes as well as in larger buildings as a cascade system with up to 120 kW output.

Intuitive operation, also conveniently via app

The modern design of the Vaillant ecoTEC plus condensing gas boiler is evident not only in its clean lines but also in its large, illuminated touchscreen display. This display impresses with its intuitive and user-friendly operation. The same applies to the matching controllers for the ecoTEC plus: the premium system controller. sensoCOMFORT, the single-circuit controller sensoDIRECT for simple heating systems or the room temperature controller sensoHOME for floor heating systems.

In conjunction with the optionally available internet module sensoNET You can also conveniently order the ecoTEC plus via free myVAILLANT App control. The internet module is easily and compactly installed under the gas condensing boiler using plug-and-play.

Hot water exactly as desired

The ecoTEC plus is available in three different versions: as a heating unit only (VC), as a combination unit with integrated instantaneous water heating (VCW), and as a combination unit with an integrated 20-liter stratified storage tank (VCI). The combination units deliver hot water particularly efficiently and are the ideal solution if space constraints prevent the installation of a separate storage tank.

For higher hot water demands, we recommend combining it with our wall-mounted storage tanks. actoSTOR or uniSTOR. These are perfectly matched to the gas condensing boiler, both visually and technically.

Technical data: Vaillant condensing gas boiler

Technical data | Unit | VC 10CS/1 -5 | VC 15CS/1 -5 | VC 20CS/1 -5 | VC 25CS/1 -5 | VC 30CS/1 -5
Heating output at 50/30°C natural gas E, natural gas LL (min - max) | kW | 3.4 - 10.9 | 3.4 - 16.4 | 3.4 - 21 | 3.4 - 26.4 | 4.5 - 33.3
Heating output at 80/60°C natural gas E, natural gas LL (min - max) | kW | 3 - 9.9 | 3 - 14.8 | 3 - 19.7 | 3 - 24.7 | Apr 30
Heating output at 50/30°C liquid gas (Min - Max) | kW | 5.4 - 10.9 | 5.4 - 16.4 | 5.4 - 21 | 5.4 - 26.4 | 8.4 - 33.3
Heating output at 80/60°C liquid gas (Min - Max) | kW | 4.8 - 9.9 | 4.8 - 14.8 | 4.8 - 19.7 | 4.8 - 24.7 | 7.8 - 30
Heating output for hot water operation: Natural gas E, Natural gas LL, Liquefied petroleum gas (Max) | kW | 20 | 20 | 24 | 27.5 | 34.8
Efficiency at 30% according to EN 15502 Natural gas E, Natural gas LL, Liquefied petroleum gas | % | 109 | 109 | 110 | 109 | 110
Efficiency during hot water operation: Natural gas E, Natural gas LL, Liquefied petroleum gas | % | 98 | 98 | 98 | 98 | 98
Seasonal space heating efficiency ηs | % | 92 | 93 | 94 | 94 | 94
Electrical power consumption at 30% | W | 52 | 45 | 41 | 57 | 59
Electrical power consumption during heating operation (Max) | W | 66 | 56 | 55 | 91 | 80
Electrical power consumption in standby mode | W | 2 | 2 | 2 | 2 | 2
Included components in electricalPerformance | | pump | | | |
Standby heat loss at tK 70°C | % | 0.91 | 0.61 | 0.45 | 0.36 | 0.3
Contents on the heating side | l | 2.1 | 2.1 | 2.1 | 2.1 | 2.6
Maximum operating pressure on the heating side | bear | 3 | 3 | 3 | 3 | 3
Maximum heating flow temperature | °C | 85 | | | |
Connection value for natural gas E 1) 2) | m³/h | 2.2 | 2.2 | 2.6 | 3 | 3.8
Connection value for natural gas LL 1) 2) | m³/h | 2.5 | 2.5 | 3 | 3.5 | 4.4
Connection value for liquefied petroleum gas 1) 2) | kg/h | 0.8 | 0.8 | 1 | 1.1 | 1.5
Condensation amount at 50/30°C | l/h | 1.02 | 1.53 | 2.04 | 2.55 | 3.06
Pump flow rate at ΔT 20 K (residual delivery head) | l/h (mbar) | 430 (200) | 645 (200) | 849 (200) | 1,075 (200) | 1,290 (200)
Expansion vessel contents | l | 10 | 10 | 10 | 10 | 10
form | bear | 0.75 | 0.75 | 0.75 | 0.75 | 0.75
Tension | | 230V/50Hz | 230V/50Hz | 230V/50Hz | 230V/50Hz | 230V/50Hz
Product dimensions (height/width/depth) | mm | 720/440/348 | | | |
Product weight | kg | 34 | 34 | 34 | 34 | 39
Heating connection (flow and return) | | G 3/4 | G 3/4 | G 3/4 | G 3/4 | G 3/4
Connection Storage | | G 1/2 | G 1/2 | G 1/2 | G 1/2 | G 1/2
Gas connection | | Ø 20 mm | Ø 20 mm | Ø 20 mm | Ø 20 mm | Ø 20 mm
Air and exhaust connections | | Ø 60/100 | Ø 60/100 | Ø 60/100 | Ø 60/100 | Ø 80/125
CE PIN | | 0063CU3910 | 0063CU3910 | 0063CU3910 | 0063CU3910 | 0063CU3910
Gas appliance category | | I2N, I3P | I2N, I3P | I2N, I3P | I2N, I3P | I2N, I3P