Vitocell 320-M

Viessmann Water Heater
Vitocell 320-M
Buffer tank for water heating

Vitocell 320-M

Heating water buffer tank with stainless steel corrugated pipe for heating drinking water, storage capacity: 750 and 910 litres.

  • 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 320-M

The Vitocell 320‑M is a combined heating water buffer tank and domestic hot water (DHW) system in a single, compact unit. It is designed for modern, energy‑efficient heating systems that require flexible heat storage, efficient DHW preparation, and easy integration with renewable energy sources.
By combining buffer storage and drinking water heating in one appliance, the Vitocell 320‑M reduces space requirements, installation effort, and system complexity—making it ideal for hybrid systems, wood‑fired heating systems, heat pumps, and PV‑supported installations.

Vitocell 320-M

Two Functions in One Device

Combines heating water buffer storage and DHW preparation in a single tank, reducing space requirements and installation complexity.

High‑Alloy Stainless Steel DHW Corrugated Pipe

The flexible corrugated pipe, made from high‑alloy stainless steel, is stress‑free integrated into the tank and ensures hygienic, on‑demand DHW heating.

PV‑Ready for Self‑Consumption

Can be combined with photovoltaic systems, allowing electric heating and DHW preparation using surplus PV electricity.

Ideal for Multi‑Generator Heating Systems

Particularly suitable for systems with multiple heat generators, such as wood boilers, heat pumps, gas or oil boilers.

Seamless System Integration

Designed for straightforward integration into:

Hybrid heating systems
PV‑supported energy concepts
Multi‑generator installations

Electric Heating Control

Optional electric heating elements can be controlled to maximise PV self‑consumption or provide summer comfort.

Efficient Buffer Management

Supports stable system operation by decoupling heat generation and heat demand.

Service‑Friendly Construction

Integrated components and clear layout simplify installation, commissioning, and maintenance.

Document Name Description Document Type Language Action
Brochure Vitocell storage water heater PDF German Download
Data Sheet Vitocell 320-M PDF German Download
Why combine buffer storage and DHW in one tank?

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

How is domestic hot water prepared hygienically?

DHW is produced on demand via a stainless steel corrugated pipe, eliminating the need for stored drinking water.

Can the system be used with wood‑fired boilers?

Yes. It is particularly well suited for wood heating systems, offering buffer storage and DHW heating in one solution.

Who should choose the Vitocell 320‑M?

It is ideal for users who want:

Compact system design
PV self‑consumption
Flexible hybrid integration
Efficient DHW and heating storage

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