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Compact Boiler Gas, Condensing, Shift-Load-CylinderecoCOMPACT

Compact floor-standing gas condensing boiler with a shift-load hot water tank.

ecoCOMPACT
  • Outstanding heating and hot water comfort in a compact package
  • Reliable and energy‑saving operation with high modulation
  • Lower gas and electricity use
  • Shift‑load technology for outstanding hot water comfort
  • Quick and easy installation
  • Simple control with or without app
ecoCOMPACT is an economical condensing boiler that boasts high heating energy efficiency of up to 92%. ecoCOMPACT VSC brings a condensing boiler and a shift‑load hot water tank together in one space‑saving unit that fits neatly into your home. All components for heating and hot water are integrated behind an elegant casing. Condensing technology, precise power control and a high‑efficiency pump work together to maximise efficiency and help lower your energy costs. With shift‑load DHW storage, you enjoy both a generous hot‑water reserve and instant hot water comfort.
ecoCOMPACT
Ideal for:
  • Heating
  • Hot water
  • Compact sizeOutstanding heating and hot water comfort in a compact package.

    Compact size

    ecoCOMPACT VSC delivers full family heating and exceptional domestic hot water comfort while occupying just 0.41 m² of floor space. Its sleek and modern casing conceals all components, so it even fits neatly in living areas – combining proven Vaillant floor‑standing efficiency with a stylish design.

  • Always the right outputReliable and energy‑saving operation with high modulation.

    A mother reads to her child from a book

    Always the right output

    With a modulation range from 15% to 100% of nominal output, ecoCOMPACT VSC continuously matches heat demand. This avoids unnecessary gas use, extends steady run times and reduces frequent on-off cycling – further improving efficiency and comfort.

  • Efficiency that lowers costsLower gas and electricity use.

    Girl is relaxing in a beanbag

    Efficiency that lowers costs

    Self‑optimising condensing technology achieves a high standard efficiency rating, using gas particularly efficiently to help cut energy costs. The high‑efficiency pump automatically reduces its output when heat demand is low, lowering electricity consumption at the same time.

  • Always readyShift‑load technology for outstanding hot water comfort.

    A man is testing the water temperature in the shower

    Always ready

    ecoCOMPACT VSC’s shift‑load process heats small volumes of water continuously and stores them at the top of the cylinder, gradually spreading downwards. Because the hottest water at 60 °C is always available at the top, you benefit from both a ready reserve for rapid and large withdrawals and effectively unlimited hot water – without depending on the temperature in the entire tank.

  • Fast setupQuick and easy installation.

    Fast setup

    The ecoCOMPACT VSCD is designed for fast and straightforward installation: integrated carrying handles, no sharp edges, adjustable feet and a comprehensive standard scope – including a high‑efficiency pump, shift‑load DHW pump and heat exchanger, a 15‑litre heating expansion vessel and an automatic heating circuit deaerator. It also comes with a split mounting concept to separate the unit into two parts for easier transport.

  • Easy to useSimple control with or without app.

    myVaillant app

    Easy to use

    The operation of the ecoCOMPACT VSC is intuitive thanks to its clear control concept. For even more convenience, add the myVAILLANT connect internet module and the multiMATIC 700 system controller to manage the heating via the myVaillant app – from the home or on the go.

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Technical data table headline

ecoCOMPACT
VSC 206/4 -5 150
VSC 266/4-5 150 (H)
VSC 266/4 -5 200
VSC 306/4-5 150
ErP Seasonal Space Heating Efficiency ClassErP Seasonal Space Heating Efficiency Class D A +++ D A +++ D A +++ D A +++
ErP Water Heating Energy Efficiency Class Of Combination HeaterErP Water Heating Energy Efficiency Class Of Combination Heater F A + F A + F A + F A +
ErP Seasonal Space Heating Energy EfficiencyErP Seasonal Space Heating Energy Efficiency92 %92 %92 %92 %
ErP Water Heating Energy EfficiencyErP Water Heating Energy Efficiency84 %84 %85 %85 %
ecoCOMPACT
VSC 206/4 -5 150
VSC 266/4-5 150 (H)
VSC 266/4 -5 200
VSC 306/4-5 150
Heat Output 50/30 °C (G20) (min - max)Heat Output 50/30 °C (G20) (min - max)4,3 - 21,5 kW5,9 - 27,1 kW5,9 - 27,1 kW6,6 - 32,5 kW
Heat Output 50/30 °C (G31) (min - max)Heat Output 50/30 °C (G31) (min - max)5,6 - 21,5 kW6,8 - 27,1 kW6,8 - 27,1 kW9,5 - 32,5 kW
Heat Output 80/60 °C (G20) (min - max)Heat Output 80/60 °C (G20) (min - max)3,8 - 20,0 kW5,2 - 25,0 kW5,2 - 25,0 kW5,8 - 30,0 kW
Heat Output 80/60 °C (G31) (min - max)Heat Output 80/60 °C (G31) (min - max)5,0 - 20,0 kW6,0 - 25,0 kW6,0 - 25,0 kW8,5 - 30,0 kW
Heat Output (G20) (Domestic Hotwater Mode) (max)Heat Output (G20) (Domestic Hotwater Mode) (max)20,4 kW--34 kW
Heat Output (G20, G31) (Domestic Hotwater Mode) (max)Heat Output (G20, G31) (Domestic Hotwater Mode) (max)-30 kW30,0 kW-
Heat Output (G31) (Domestic Hotwater Mode) (max)Heat Output (G31) (Domestic Hotwater Mode) (max)20,4 kW--34 kW
Efficiency (30% acc. to EN 15502)Efficiency (30% acc. to EN 15502)108 %108 %108 %108 %
Efficiency (Domestic Hotwater Mode)Efficiency (Domestic Hotwater Mode)98 %98 %98 %98 %
Gas Flow Rate, G20Gas Flow Rate, G202,59 m³/h3,24 m³/h3,24 m³/h3,67 m³/h
Gas Flow Rate, G31Gas Flow Rate, G311,8 kg/h2,38 kg/h2,38 kg/h2,69 kg/h

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