Thermo Pro 90

Powerful heating solution for large vehicles

Specially developed for large commercial vehicles, minibuses and specialty vehicles, the Thermo Pro 90 parking heater, featuring up to 9.1 kW heat output, heats the engine to optimum starting temperatures quickly. Thanks to the "Arctic Start" and height adjustment function, the Webasto water heater is also suitable for use in extreme conditions.

Product picture of Thermo Pro 90 heater

Benefits of Thermo Pro 90

Compact and space-saving

With a volume of just 0.010 m³, the heater can also be integrated into small spaces, usually in the undercarriage.


The Thermo Pro 90 scores points with its low fuel consumption by protecting the environment and reduces operating costs.

Fast heating with Arctic Start

The Arctic Start function ensures that the engine warms up quickly, reduces engine wear and improves fuel efficiency.

Altitude adjustment

It operates even in high mountain conditions, thanks to its automatic altitude adjustment for up to 4,500 meters above sea level.

Residual heat utilization

In combination with a heat exchanger, the circulation pump of the Thermo Pro 90 can be controlled separately for efficient use of its residual heat in the cooling circuit.

Product details

Product specifications


  • Dimensions (L x W x H) in mm: 385 x 139 x 219
  • Weight: 4.9 kg
  • Rated voltage: 12 V, 24 V
  • Fuel: Diesel
  • Heating output: 1.8-9.1 kW
  • Temperature range: -40 °C to +80 °C.

Model overview


  • Thermo Pro 90 D 12 V Basic
  • Thermo Pro 90 D 24 V Basic
  • Thermo Pro 90 D 24 V HDD (Heavy Duty Design)
  • Thermo Pro 90 D 24 V High Altitude


Thermo Pro 90 - Datasheet

574 KB

Find your dealer

Find your nearest Webasto dealer quickly and easily or arrange your consultation appointment directly.

Find your Heating Solutions Dealer

More solutions

  • Air heaters

    Explore the range of air heaters from Webasto, offering quick, efficient heating for various vehicles with low fuel consumption.
    Man with dog in an RV with air heater
  • Rooftop air-conditioning

    Explore the benefits of the rooftop air conditioning systems from Webasto. Efficient cooling, easy installation, and low maintenance.
    Bus driving on road with rooftop air-conditioning
  • Integrated air-conditioning

    Explore integrated air conditioning systems from Webasto, offering efficient, versatile, and reliable cooling solutions for a variety of vehicles and marine vessels.
    Person getting into minivan with integrated air-conditioning