Home

Thermo Pro 90 / Chiller
(Marine)

Powerful heating comfort for everyday use

With a heat output of 9 kW, this Webasto water heater provides even heat on board which reaches various cabins via convectors or electrical fan blowers. Convectors work independently of electricity and are noiseless. The compact heater itself is also very quiet and can be adjusted steplessly. It is located in the engine compartment.

 

In combination with a BlueComfort air-conditioning system, the chiller version of the heater is the best choice as it does not require a coolant pump.

Thermo Pro 90 diesel heater with integrated pump, combustion chamber and control unit; efficient cabin and coolant preheat in Webasto thermal systems.

Benefits of Thermo Pro 90 / Thermo Pro 90 Chiller (Marine)

Reliable

This water heater is ideal even for everyday use.

Stepless adjustment

The heat output can be adjusted continuously between 1.8 and 9.1 kW in boost mode.

Compact and quiet

Despite the high output, Thermo Pro 90 / Thermo Pro 90 Chiller are characterized by compact dimensions and an extremely low noise level.

Easy to service

The appliances are low-maintenance.

Optimized for maritime use

Whether for a 44-foot yacht or a 40-foot motorboat - these water heaters can be used flexibly and provide heat via convectors or electrical blower fans.

Product details

Product specifications

 

  • Dimensions (L x W x H) in mm:
    • Thermo Pro 90 (Marine): 352 x 131 x 232
    • Thermo Pro 90 Chiller (Marine): 385 x 131 x 219
  • Weight in kg / in lbs:
    • Thermo Pro 90 (Marine): 5.3 / 11.7
    • Thermo Pro 90 Chiller (Marine): 4.9 / 10.8
  • Rated voltage: 12 V, 24 V
  • Fuel: Diesel
  • Heat output: 1.8 - 9.1 kW

Model overview

 

  • Thermo Pro 90 (Marine)
  • Thermo Pro 90 Chiller (Marine)

Downloads

Get in touch

We will be happy to answer your questions. Write us a message and we will get in touch with you immediately.

Find your Heating Solutions Dealer Webasto After-Sales Support – 24/7 Contact Key Visual

More solutions

  • Marine heaters

    Webasto marine heaters: air and water heating systems (2–15 kW) for boats and yachts — compact, quiet, fuel‑efficient solutions with system-partner support
    Skipper in yellow jacket on a sailing yacht with mast and rigging against open sea, exemplifying Webasto marine solutions for electrification, thermal control.
  • Marine air-conditioning systems

    Webasto system partner delivering compact, quiet marine air-conditioning systems for boats with modular design, efficient cooling, heating and smart control
    Four people aboard a sailing yacht on open sea, illustrating Webasto as a system partner for marine climate, thermal management and electrification.
  • Marine roofs and shades

    Webasto marine roofs and shades — robust UV‑resistant roof and shading systems for boats, configurable electric & manual solutions, easy installation, OEM-ready
    Electric boat with solar canopy and hardtop, showcasing marine battery integration, thermal management and roof-system, as system partner for OEM electrification.