Vitodens 342-f

Viessmann Light Commercial
Vitodens 343-F
Gas condensing storage combination boiler

Vitodens 343-F

Viessmann Vitodens 343‑F – Gas Condensing Storage Combi Boiler
Premium floorstanding gas condensing storage combi boiler with integrated stainless steel DHW cylinder and solar thermal connection, delivering 1.9 to 19 kW, designed for maximum efficiency, high hot water comfort, and renewable energy integration.

Features

  • Integrated Stainless Steel DHW Cylinder

    Built‑in stainless steel loading cylinder High domestic hot water convenience Compact all‑in‑one heating and hot water solution Reliable hot water availability Hygienic stainless steel construction
  • Direct Solar Thermal Integration

    Factory‑prepared solar thermal connection Compatible with Viessmann Vitosol solar collectors Supports: Domestic hot water heating Central heating backup Reduces conventional fuel consumption Improves overall system efficiency
  • High‑Efficiency Gas Condensing Technology

    Advanced condensing operation Maximizes fuel utilization Reduces energy consumption Lower operating costs Supports environmentally responsible heating
  • MatriX‑Plus Burner

    Latest‑generation stainless steel burner technology Extremely stable flame operation Low nitrogen oxide (NOx) emissions Quiet running characteristics Long service life
  • Wide Modulation Range

    Part of the Vitodens 300 series with modulation down to very low outputs Output range: 1.9 to 19 kW Better matching of boiler output to actual heating demand Reduced burner cycling Improved seasonal efficiency
  • Inox‑Radial Stainless Steel Heat Exchanger

    Corrosion‑resistant stainless steel construction Highly efficient heat recovery Low energy losses Long operational lifespan Proven Viessmann technology

Technical Documents

Document Name Description Document Type Language Action
Technology brochure PDF German Download

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