Vitocal 350-G
Brine-water heat pump with water/water capability.
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Rated heat output: 20.5 - 104.6 kW
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High productivity thanks to two-stage design
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Flow temperature up to 70 °C
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Low noise and vibration
Environmentally Responsible Heat Pumps – Find out more about the different options and benefits!
Rated Heating Power for Brine/Water Handling
20.5 - 42.3 kW (single-stage) and 41.0 - 84.6 kW (two-stage)
Rated heating power for water/water operation
25.4 - 52.3 kW (single-stage) and 50.8 - 104.6 kW (two-stage)
High heating power
With two-stage design
Flow temperature up to 70 °C
Thanks to the EVI compressor
Low noise and vibration
Thanks to the sound-optimal design of the device
Low operating costs due to high COP
Efficiency according to EN 14511 up to 5.0 (brine 0 °C/water 35 °C)
Mono mode possible
For heating and hot water
High efficiency at every working point thanks to RCD system
Refrigerant Cycle Diagnostic System in Combination with Electronic Expansion Valve
Easy-to-use Vitotronic control unit
With plain text and graphic display
Control unit for weather-compensated heating operation
As well as natural or active cooling
Master/slave solutions for higher heat requirements
For example, in combination with Vitocal 300-G
Self-generated energy consumption
Thanks to preparation for optimized electricity consumption from photovoltaic systems
Vitoconnect Web Interface
For operation and maintenance via Viessmann apps (accessories)
Vitocal 350-G: Heat pump with high flow temperature up to 70 °C
The powerful Vitocal 350-G brine/water heat pump is one of the quietest heat generators of its kind thanks to its low-vibration design.
Where the need for heat is even greater, the Vitocal 350-G can operate in a two-stage mode with an additional heat pump of the same type or with the Vitocal 300-G in a master/slave system, delivering up to 84.6 kW of power. At an early stage of system design, this configuration allows for the optimal selection of heat pumps for a particular building.
Vitocal 350-G achieves high flow temperatures of up to 70°C. This is achieved by using an EVI (Enhanced Steam Injection) refrigerant circuit, where steam injection cools the refrigerant, allowing it to be compressed more tightly than would otherwise be possible. This means that the Vitocal 350-G is also suitable for retrofit projects that include radiator heating systems.
For information on the refrigerant/refrigerant circuit, please refer to the data sheet (PDF).
In the system, the master/slave Vitocal 350-G, as the master, provides a high flow temperature to heat the DHW, while the Vitocal 300-G (slave, without its own control unit) covers the required heat load. The EVI refrigerant circuit allows the Vitocal 350-G to achieve a very high COP of up to 5.0, which contributes to low operating costs.
The Vitocal 350-G heat pump is already prepared to operate cost-effectively with self-generated energy from a photovoltaic system. The intelligent control unit ensures maximum consumption of self-generated energy and therefore reduces energy costs.
The EHPA quality mark serves as a confirmation of COP (coefficient of efficiency). The German EHPA Quality Mark Committee has confirmed that the Vitocal 350-G heat pump from Viessmann meets the requirements of the EHPA quality mark.
Information & Certificate
European Heat Pump Association
- Brine/water heat pump, single-stage heat output: 20.5 – 42.3 kW; two-stage: 41.0 – 84.6 kW
- Water/water heat pump, single-stage heating power: 25.4 – 52.3 kW; two-stage: 50.8 – 104.6 kW
- Low operating costs with the highest level of efficiency at each operating point thanks to the innovative RCD (Refrigerant Cycle Diagnostics) system with EEV (Electronic Expansion Valve).
- Energy efficiency class*: A++ / A++*In accordance with Commission Delegated Regulation (EU) No 811/2013 for heating; medium climatic conditions – application at low (35 °C)/medium (55 °C) temperatures.
Integrated range of solutions for Vitocal 350-G
350-G Benefit from value-added and digital services from Viessmann's integrated range of solutions.
Viessmann Heat
Viessmann Wärme is our heating system rental service - ideal for those who want to enjoy superb heating comfort without having to buy a boiler.
ViShare
Smart electricity tariffs for your home. Flexible, environmentally friendly and 100% renewable. The electricity tariffs are set by Energy Market Solutions GmbH (EMS), a contractual partner of the ViShare Energy Community and a subsidiary of the Viessmann Group.
Funding professional
The Viessmann FörderProfi service streamlines and simplifies the entire subsidy process, from application to payment.
The ViCare app
The ViCare app provides intuitive heating control. Green for go - the user can see at a glance in the app whether their heating system is working as it should.
The ViGuide app
ViGuide is an application for sales partners. It has numerous functions for monitoring and managing systems in both detached and multi-family houses, as well as providing quick access to the technical service.
Vitoconnect
Vitoconnect is the interface between the boiler and the app - a prerequisite for controlling the heating system via smartphone and tablet. It also enables remote system maintenance for contractors via the Vitoguide app.
wibutler
wibutler is a manufacturer-independent smart home control centre that connects products from different manufacturers and enables their control and automation through apps.
Benedict Doll – Start at Home
Even as a child, Benedict Doll spent a lot of time outside, training for biathlon. However, climate change means that snow is becoming increasingly rare in the region where it lives. Therefore, the 2017 biathlon sprint world champion and his family decided to focus on innovation and sustainability while renovating their home with a heat pump and a photovoltaic system to contribute to climate protection.
Vitotronic 200 communication control unit
Viessmann uses the user-friendly Vitotronic 200 control unit to ensure standardized operation of all its heat generators. Its many features include menu-based control, an integrated diagnostic system, control of an instant water heater and an additional (existing) oil or gas boiler, and of course, natural and active cooling functions.
In addition, the Vitotronic 200 is capable of communication and, through the Vitocom 300 communication module, allows you to configure, monitor and optimize the heat pump system via the Internet using the Vitotrol app on your smartphone or tablet.
Product details
| Rated heat output (kW), operating point A7/W35 (according to EN 14511) |
Type BW/BWS 351.B20: 20.5 kW | Type BW/BWS 351.B27: 28.7 kW | Type BW/BWS 351.B33: 32.7 kW | Type BW/BWS 351.B42: 42.3 kW |
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| ε Efficiency Ratio (COP) A7/W35 |
Type BW/BWS 351.B20: 4.8 | Type BW/BWS 351.B27: 4.9 | Type BW/BWS 351.B33: 5.0 | Type BW/BWS 351.B42: 4.8 |
| Energy efficiency class* |
A++ / A++ * In accordance with Commission Delegated Regulation (EU) No 811/2013 for heating, medium climatic conditions – low temperature application (35 °C) / medium temperature application (55 °C) |
| Energy efficiency class, hot water heating |
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| Applications |
Detached houses, semi-detached houses, apartment buildings, commercial enterprises, local government premises, new construction and modernization projects. |
| Surgery |
Vitotronic 200 control unit with text and graphic display; can be controlled via the ViCare app |
| Hot water heating |
An additional DHW cylinder is required, which provides a high level of convenience for DHW |
| Additional features |
Free cooling function with optional NC unit; active cooling function with optional AC unit |
| Product cross-section |
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