Gas Condensing Boiler
Proven gas condensing boiler with Inox-Crossal heat exchangers and Vitotronic control unit
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Rated heat output: 187 - 635 kW
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Standard seasonal efficiency [DIN]: up to 98%
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High operational reliability and long service life
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Self-cleaning effect
Your local Viessmann sales partner will provide you with individual advice
Gas Condensing Boiler
187 - 635 kW
Standard Seasonal Efficiency [DIN]
Up to 98% (Hs) [gross cv].
Self-cleaning effect
Thanks to the smooth stainless steel surface
High operational reliability and long service life
Thanks to the corrosion-resistant Inox-Crossal stainless steel heat exchanger
Clean combustion
Due to the low load of the combustion chamber and the co-flow design of the chamber
Available with ELCO or Weishaupt gas burner with gas pressure jet
Available Former Jobs
Two mating connectors
For a hydraulic connection optimized for condensing technology
Color Touch Screen
Easy-to-operate Vitotronic control unit with colour touch screen
Built-in LAN interface
For Internet connection and built-in WiFi for service interface
Vitocrossal 300 type CT3B with Inox-Crossal heat exchangers and Vitotronic control unit
The Vitocrossal 300 type CT3B is a floor-standing gas condensing boiler with an Inox-Crossal heat exchanger. Vitocrossal 300 gas condensing boilers are supplied with factory-installed ELCO or Weishaupt gas burners.
Advanced condensing technology
The design of the Inox-Crossal heat exchanger allows the Vitocrossal 300 to provide high performance while maintaining a modest size and low weight. In addition, the Vitocrossal 300 can be disassembled into two sections, making it easier to manoeuvre.
Highly efficient heat transfer and high condensation rates achieve standard seasonal efficiencies [DIN] of up to 98% (Hs) [gross cv]. This high standard seasonal efficiency is the result of the principle of counter-flow between hot gas and boiler water, as well as the intense turbulization of hot gases as it passes through the heat exchanger.
The second return connector of the Vitocrossal 300 provides a hydraulic connection, which is very advantageous for the use of condensing technology.
User-friendly and high-performance Vitotronic control unit
The user-friendly Vitotronic control unit with a large colour touch screen enables fast commissioning via the assistant function. The boiler can be connected directly to the internet for remote monitoring via the built-in LAN interface. The Vitosoft 300 service tool communicates directly via WiFi. The energy consumption can be clearly seen in the power cabin of the control unit.
Product details
| Power in kW (modulated) |
187 – 635 kW. Type CT3B 9/2018: output stages: 187.0; 248,0; 314,0; 408,0; 508,0; 635.0 kW |
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| Standard Seasonal Efficiency [DIN] |
Up to 98% (Hs) [gross cv]. |
| Energy efficiency class |
– |
| Fuel |
Natural gas E, LL and LPG |
| Applications |
Gas heating in apartment buildings, large residential buildings, as well as in public and commercial premises, in new construction and modernization projects. |
| Surgery |
Easy-to-operate Vitotronic control unit with colour touchscreen. Built-in LAN interface for Internet communication and built-in WiFi for service interface. |
| Hot water heating |
Additional DHW cylinder(s) required for a high level of DHW convenience |
| Additional features |
Available with ELCO or Weishaupt gas burner with gas pressure jet |
| Product cross-section |
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ServiceConnect Commercial
The innovative service concept gives Viessmann’s sales partners an additional advantage when working with commercial customers and local authorities thanks to complete service from a distance.
- Increased operational reliability
- Convenient remote diagnostics
- Complete management of fault messages
