Thermo Top Pro

High-performance water heaters for increased comfort, safety and reliability

Introducing the Thermo Top Pro 120 (12 kW) and Thermo Top Pro 150 (15 kW) - a new generation of water heaters designed to elevate your comfort and ensure safety and reliability. Ideal for construction and agricultural machinery, small to mid-sized buses, electric buses (as a range extender in cold temperatures) and trucks. The powerful heaters are available in both 12 Volt and 24 Volt versions.

Benefits of Thermo Top Pro 120/150

The Webasto Thermo Top Pro 120/150 water heaters offer high performance heating, intelligent diagnostics, automatic altitude adjustment, resilience to extreme weather conditions, a compact design for easy installation as well as a high-performance coolant pump for enhanced performance.

High performance

Experience high performance and efficient heating solutions with the 12 kW Thermo Top Pro 120 and the 15 kW Thermo Top Pro 150.

Intelligent diagnostics

Our smart diagnostic and safety system includes sensors to monitor exhaust gas and coolant temperature, ensuring your heater runs as efficiently as possible.

Altitude adjustment

Incorporated automatic altitude adjustment guarantees full heating performance up to
3,500 meters above sea level.

Extreme weather resistance

Designed for tough environments, these heaters function seamlessly even under extreme conditions such as temperatures down to 40 degrees Celsius below zero.

Compact design

Despite their high performance, these heaters are compact, simplifying installation in confined spaces.

High performance coolant pump

Our powerful coolant pump U4850 which is part of the standard scope of delivery, provides high volume flow and great pressure resistance.

Technology highlight

High-efficiency burner design

The Thermo Top Pro 120/150 boasts a high-efficiency burner design, ensuring optimal performance with minimal fuel consumption.

Truck driving through winter landscape Truck winter

Product details

Product specification

The Thermo Top Pro series is available in both 12 Volt and 24 Volt variants. They come with a compact coolant pump U4850, offer heating capacity of 12 kW (Thermo Top Pro 120) and 15 kW (Thermo Top Pro 150) and can function under temperatures ranging from -40 to +80 degrees Celsius. With a weight of 11 kg and small dimensions, these heaters are compact yet powerful.

Model overview

Select from our extensive range of Thermo Top Pro models tailored to meet your specific needs. We offer the Thermo Top Pro 120 and 150, each in 12 Volt, 24 Volt and 24 Volt variants without a coolant pump.

What is included

Our water heaters come with all necessary accessories such as fuel and coolant pumps, mounting kit and wire harnesses - ready to use for your installation.


Thermo Top Pro 120/150 - Datasheet

286 KB

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