Vitosol 300-TM

Vacuum tube collector

High performance vacuum tube collector with ThermProtect

Heat pipe principle
Efficient heat transfer
Quick, easy installation
Exceptionally long service life
Heat pipe principle

Highly efficient vacuum tube collectors based on the heat pipe principle

Efficient heat transfer

Duotec double pipe heat exchangers made of copper completely encapsulate the condensers

Quick and straightforward installation

Through the Viessmann assembly and connection systems

Exceptionally long service life

Thanks to low stagnation temperatures and prevention of steam forming within the system


ThermProtect automatic temperature-dependent shutdown for high operational reliability

Not susceptible to contamination

The absorber surfaces, with highly selective coating, are integrated into the vacuum tube

Optimum orientation towards the sun

Due to straightforward absorber alignment

Dry connection

No direct contact between process medium and heat transfer medium, for easy replacement of tubes while the system is full

Visually seamless whole

Collector casing and absorber surfaces in dark blue

Minimised heat losses

Through highly effective thermal insulation of the header casing

Vitosol 300-TM vacuum tube collector

Vitosol 300-TM vacuum tube collector

The Vitosol 300-TM high performance collector is one of the most efficient models on the market and is particularly recommended for use in restricted spaces. The absorber angle can be adjusted by +/- 25 degrees to deliver an exceptionally high yield, even when the sun is in less favourable positions.

The collector can be installed and used in any position and is designed for use on detached houses and apartment buildings. It features ThermProtect automatic temperature-dependent shutdown, which is activated if heat draw-off stagnates for a long period whilst there is a high level of insolation.

The Vitosol  300-TM is currently the only collector on the market that can be installed horizontally (max. 3  degrees tube incline) and includes ThermProtect automatic temperature-dependent shutdown. It prevents overheating of the collectors when no heat is drawn off and there is a high level of insolation. The Vitosol  300-TM is therefore also suitable for buildings that are not in use all year round, such as residential buildings during holiday periods.

The collector works according to the heat pipe principle, where the heat transfer medium does not flow directly through the tubes. Instead, a process medium evaporates inside the heat pipe and transfers the absorbed heat through condensation to the heat transfer medium via the Duotec double pipe heat exchanger. This method guarantees optimum heat transfer.

The Vitosol  300-TM is designed for an exceptionally long service life. This is thanks to its high grade, corrosion-resistant materials, including glass, aluminium, copper and stainless steel. The absorber is an integral part of the vacuum tube. This protects it from weather influences and contamination, and ensures high energy yields for years to come.

The above roof installation system with rafter anchors simplifies the task of securing the collectors. The rafter hooks and flanges are designed to be fixed directly onto the rafters, enabling the collectors to be perfectly integrated into any kind of roof cover. The two mounting rails also save additional time during installation.

In systems with multiple collectors, dark blue cover panels create a seamless visual transition between the collector casing and absorber surfaces. Retaining caps in the base rail, in the same colour as the casing, prevent the tubes from slipping. Should a service be required, heat pipe tubes can be replaced quickly and easily without having to drain the system, due to their dry connection.

The integrated range of solutions for the Vitosol 300-TM

Benefit from the value added services and digital services of Viessmann's integrated range of solutions.


The Viessmann FörderProfi service streamlines and simplifies the entire subsidies process, from application to payment.

More about FörderProfi

Product details

Gross area

1.98 / 2.36 / 4.62  m²

Collector type

Vacuum tube collector


Dark blue collector casing and absorber surfaces form a visually seamless whole.

Application area

Residential buildings, commercial enterprises, local authority premises, new build and modernisation projects

Installation type

Universal application through vertical or horizontal installation in any location, either on rooftops, faççades or for freestanding installation. Special balcony module (1.26  m² absorber area) for installation on balcony railings or faççades.

Additional features

For DHW, central heating and swimming pool water heating via a heat exchanger plus process heat. By combining solar thermal with a heat generator, energy efficiency class A+ (as a system label) can generally be achieved for the overall heating system.

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