SKU: .423377-PRO Category:


Viessmann offers a comprehensive range of home comfort products that sets the standards for sustainability and efficiency. The Vitocrossal 300 is Viessmann’s top-of-the-line boiler for residential and light commercial applications. The Vitocrossal 300 is known for its high temperature heating and water volume, all while maintaining an impressive 95% AFUE rating. Perfect for homes with multi-zone or high mass radiators, the Vitocrossal 300 features wide water passage ways that allows for simplified piping with full system flow. An intelligent combustion control along with a user-friendly Vitotronic 200 control makes the Vitocrossal 300 a favorite among owners looking for power and efficiency.
High Mass (Water Volume)
The Viessmann Vitocrossal 300 features a unique heat exchanger that provides space for a large amount of water. This allows the boiler to efficiently serve high-demand space heating sources, such as high temperature fin tube and high mass radiators.
Advanced Condensing Technology
The Vitocrossal 300 includes an Inox-Crossal heat exchanger that offers ideal conditions for intensive utilization of hot gases. The vertical orientation of the heat exchanger allows condensate to run off downwards, creating a self-cleaning effect.
Award-Winning Control Unit
The Viessmann-made Vitotronic 200, KW6B control manages the entire heating system and ensures maximum performance and comfort at all times. This user-friendly control features a backlit display, multi-line text and graphics for hassle-free boiler control.
Outdoor Reset
The Vitotronic 200 control includes an outdoor reset mode that can reduce fuel consumption up to 15%. The outdoor reset adapts the boiler’s operating temperature to the changing outdoor temperature, allowing for excellent returns on an initial investment.
Lambda Pro Combustion Management System
Equipped with the state-of-the-art Lambda Pro combustion management system, the Vitocrossal 300 adapts combustion to changing gas qualities and operating conditions to optimize performance and efficiency.

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