The Viessmann Vitotrol 100 OpenTherm is a high‑performance wired modulating room temperature controller designed to provide precise, energy‑efficient heating control for boilers equipped with OpenTherm communication. By continuously adjusting boiler output to match real‑time room temperature requirements, this controller delivers enhanced comfort, reduced energy consumption, and smoother system operation compared to traditional on/off thermostats.

Featuring an integrated digital time switch, the Vitotrol 100 OpenTherm offers full scheduling capabilities, allowing users to set daily or weekly heating programmes tailored to their lifestyle. Its intuitive digital interface ensures easy temperature adjustments, clear visibility of settings, and simple navigation—making it ideal for modern homes seeking both efficiency and convenience.

Durable, reliable, and designed to integrate seamlessly with compatible Viessmann systems, this controller is the perfect choice for homeowners wanting advanced modulation with flexible time control.

• OpenTherm modulating control
  Continuously adjusts boiler output for greater efficiency and consistent comfort.

• Integrated digital time switch
  Provides programmable heating schedules for improved energy management.

• Energy‑efficient performance
  Minimises boiler cycling, reduces fuel usage, and enhances system longevity.

• Precision temperature control
  Ensures stable and accurate room temperature maintenance.

• Clear digital interface
  Easy‑to‑read display with straightforward operation.

• Reliable wired connection
  Offers stable communication with the boiler for precise modulation.

• Ideal for Viessmann OpenTherm‑compatible systems
  Ensures seamless integration and optimised performance.

• Modern, compact design
  Clean, unobtrusive appearance suitable for any interior.

• Type:
  Wired OpenTherm modulating room temperature controller

• Communication Standard:
  OpenTherm protocol (wired)

• Programming:
  Digital time switch with programmable daily/weekly schedules

• Control Method:
  Continuous modulation based on room temperature and demand

• Installation:
  Wall‑mounted, hard‑wired to the boiler’s OpenTherm interface

• Application:
  Advanced heating control with modulation and time scheduling

• Compatibility:
  Viessmann boilers supporting OpenTherm operation
  (Check boiler documentation for specific model compatibility)

• Display:
  Digital screen showing temperature settings, schedules, and operational modes

• Design:
  Sleek, modern housing for discreet, tidy installation