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Gas Heating Systems

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For convenient heat generation with natural gas, Viessmann offers various technologies that meet a wide range of needs. For example, for gas heating in new builds or modernization projects, for owner-occupied apartments, single-family homes or even for large projects in the housing industry. Gas condensing boilers are particularly suitable for use in new buildings. These are extremely compact and wall-mounted units that can fit in almost any room.

Features & Benefits
  • Low temperature oil/gas boilers, 90 to 1950 kW
  • Economical and environmentally responsible through modulating boiler water temperature
  • Standard seasonal efficiency [to DIN] with fuel oil: 88 % (Hs) [gross cv] / 94 % (Hi ) [net cv]
  • Optional stainless steel flue gas/water heat exchanger for higher standard seasonal efficiency [to DIN] through condensing technology
  • Three-pass boiler with low combustion chamber loading, resulting in clean combustion with low emissions
  • Wide water galleries and large water content ensure excellent natural circulation and reliable heat transfer
  • Time saving installation of the boiler casing and control unit thanks to the Fastfix system for medium and industrial/commercial boilers
  • From 700 kW with walk-on boiler covers for easier installation and maintenance
  • Long burner runtimes and fewer switching intervals due to large water content protect the environment

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SIRAC Southern Africa (Proprietary) Limited
Block E, The Terraces, Steenberg Office Park,
Tokai, Cape Town, 7966

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