Vitocell 340-M

Viessmann Water Heater
Vitocell 340-M
Buffer tank for water heating

Vitocell 340-M

Multivalent heating water buffer tank with drinking water heating, storage capacity: 400, 750 and 950 liters.

  • Multivalent heating water buffer tank
  • Low space requirement and installation effort
  • Optimal use of solar energy
  • Drinking water corrugated pipe made of stainless steel

Vitocell 340-M

The Vitocell 340‑M is a combined heating water buffer tank and domestic hot water (DHW) system in a single compact unit. It is designed for modern heating systems that require efficient heat storage, hygienic DHW preparation, and seamless integration with renewable energy sources—particularly solar thermal systems.
By combining buffer storage and drinking water heating in one device, the Vitocell 340‑M significantly reduces space requirements and installation effort, making it ideal for new builds, modernisation projects, and hybrid heating systems.

Vitocell 340-M

Two Functions in One Device

Combines heating water buffer storage and domestic hot water preparation in a single tank, eliminating the need for separate components.

High‑Alloy Stainless Steel DHW Corrugated Pipe

The elastic, stress‑free corrugated pipe, made of high‑alloy stainless steel, ensures hygienic on‑demand DHW heating without stored drinking water.

Optimised Solar Energy Utilisation

Efficient solar use is achieved through targeted cooling in the lower tank section, supported by the large heat exchanger surface of the DHW corrugated pipe.

Solar Divicon Connection Set (Accessory)

Optional connection set with Solar‑Divicon enables simple and clean mounting directly on the Vitocell unit.

Seamless Solar Thermal Integration

Designed for efficient operation with Viessmann solar thermal systems for domestic hot water heating.

Multi‑Generator System Compatibility

Suitable for heating systems with multiple heat generators, such as:

Solar thermal systems
Heat pumps
Gas or oil boilers
Biomass heating systems

Flexible Hydraulic Connections

Multiple connection options simplify integration into a wide range of system layouts.

Service‑Friendly Construction

Clear internal structure and integrated components simplify commissioning, inspection, and maintenance.

Document Name Description Document Type Language Action
Brochure Vitocell storage water heater PDF German Download
Data Sheet Vitocell 340-M/360-M PDF German Download
What is the main benefit of combining buffer storage and DHW in one tank?

It saves space, reduces installation effort, and simplifies system design compared to separate tanks.

Why is the Vitocell 340‑M particularly suitable for solar thermal systems?

The design enables efficient heat transfer and targeted cooling, maximising solar yield and system efficiency.

Is the Vitocell 340‑M suitable for retrofit projects?

Yes. Its compact design and combined functionality make it ideal for modernisation and retrofit applications.

Who should choose the Vitocell 340‑M?

It is ideal for users seeking:

Compact system design
Efficient solar integration
Hygienic DHW preparation
Reduced installation effort

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