An affordable heating solution with proven quality and performance


The benefits at a glance

  • Maximum heat extraction and efficiency thanks to the triple-pass heat exchanger.
  • Long service life and maximum reliability with extremely durable cast iron heat exchanger.
  • Clean and efficient combustion thanks to the stainless steel combustion chamber insert.
  • Quiet combustion with Beckett or Riello burner.
  • For greater efficiency and comfort, modulate the boiler water temperature with a Vitotronic control.
  • Eliminate the need for a chimney and combustion air supply opening with the direct vent option (up to VR1-33).
  • Low maintenance cost with service-friendly burner and easy-to-clean flue gas passageways.


Efficient by design

The Vitorond 100, with its triple-pass heat exchanger, is designed to achieve a high level of efficiency while providing exceptional comfort. Unlike single-pass boilers, the Vitorond 100 guides flue gasses through the heat exchanger three times, allowing the greatest amount of heat extraction to be achieved. This design significantly increases the efficiency of the boiler and results in excellent fuel utilization, reducing emissions and your heating cost.


Control your comfort

Select an easy-to-use room thermostat or, for greater control and additional energy savings, choose a Vitotronic system control. Unlike conventional boilers, which operate at a consistently high boiler water temperature, the Vitorond 100 with Vitotronic control adjusts the boiler water to outdoor temperatures, boosting efficiency while keeping your home comfortable at all times.

Where can I buy a Vitorond 100?


Viessmann products are available from Viessmann authorized stocking wholesalers across the US. If you need help finding a local wholesaler, please contact a Viessmann Sales Representative via our Sales Network.


To get a quote for a new Vitorond 100 boiler including system installation, please contact a licensed professional heating contractor near you. You can find a Viessmann Sales Representative via our Sales Network.

Product details


Rated input
91 to 245 MBH - 27 to 72 kW
Efficiency (AFUE)
Up to 86.9%
No. 2 fuel oil
Application range
Residential homes, new buildings and retrofits
DHW heating
Additional DHW tank(s) required, for a high level of DHW convenience
Additional features
The sectional design ensures problem-free transport into difficult-to-access boiler rooms
Cutaway view



Product manuals

Installation, operating and service instructions

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Parts catalog

Parts lists and diagrams for the Viessmann product line

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EnergyGuide labels

Efficiency labels for Viessmann residential boilers

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CAD drawings

2D and 3D design files in DWG and ADSK format

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A perfect match – System technology

"The whole is greater than the sum of its parts." According to this philosophy, Viessmann does not just make individual heating equipment components that meet the high Viessmann standards for quality, reliability and effectiveness. Rather, all products are part of a matching concept, where all components complement one another. Only the perfect interaction of system integrated components draws out the maximum potential of our innovative leading technology.

Viessmann system technology includes everything you need for a reliable and economical heating system. The Vitotronic control unit with remote control, the powerful Vitocell DHW tanks for best DHW convenience, to high-quality solar thermal systems for cost-saving heating.

Pro center

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Engineering specifications and product submittals

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Training videos

Installation and service guides for contractors (Pro Login required)

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Technical support

Expanded telephone support for heating contractors

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Partner Program

Rewards program for heating contractors

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