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Heating solutions for
boats

Engine-independent cabin, engine and propulsion battery heating on sailboats, motorboats and yachts

Webasto diesel and electric heating systems for boats and yachts can be selected for different destinations, heating requirements and boat sizes. The air and water heaters and accessories have been specially developed for use on board. With heating outputs between 2 and 120 kW, there is a solution for every requirement. For retrofitting, please contact one of our installation partners in your area who specializes in boats.

Air heaters for boats

Our Air-Top models heat the air directly with a heating output of between 2 and 5.5 kW and blow it into the cabin at individually definable outlet points. To implement the ideal installation solution for the heater, the air outlets, the fresh air intake and the exhaust air, Webasto offers a wide range of stainless steel accessories. You can also combine two heaters if your heating requirements are greater. Webasto air heaters are extremely efficient and quiet. Thanks to their compact size, they do not take up much space on board. For operation, you can choose between the easy-to-understand, central MultiControl or the ThermoConnect app, which can be controlled from anywhere.

Key facts

  • Simple installation
  • Fast heating up
  • Reliable dehumidification of the cabin
Winter sunset on a yacht bow in the Baltic Sea with frost and warm cabin glow, showcasing Webasto Marine heating systems for reliable thermal comfort at sea. Webasto Marine Solutions – Winter Yacht Deck, Baltic Sea

Product overview marine air heaters

  • Air Top Pro 25

    Air Top Pro 25 air heater: 0.7–2.5 kW boost power, whisper‑quiet operation, altitude‑ready to 5,500 m, energy‑efficient design and plug‑play vehicle integration
    Air Top Pro 25 compact air heater delivering rapid cabin heating and efficient integration into Webasto's thermal management and electrification systems. Webasto Air Top Pro 25 diesel heater - orange header banner
  • Air Top 2000 STC (Marine)

    Air Top 2000 STC marine diesel air heater offering compact, quiet 2 kW heating with precise temperature control, fuel-efficient operation and easy maintenance
    Air Top 2000 STC compact diesel air heater on orange technical background, emphasizing Webasto's vehicle thermal management and cabin heating systems. Webasto Air Top 2000 STC Diesel Air Heater – Product Header Visual
  • Air Top 2000 STC

    Air Top 2000 STC air heater from Webasto — compact, fuel-efficient 0.9–2.0 kW heater for vehicles, boats and cargo, flexible installation and simple maintenance
    Air Top 2000 STC compact diesel air heater on orange technical background, emphasizing Webasto's vehicle thermal management and cabin heating systems. Webasto Air Top 2000 STC Diesel Air Heater – Product Header Visual

Water heaters for boats

Our water heaters come invarious sizes, from 5 to 120 kW heat output. They heat the water in a radiator system, which then heats the air in the various areas on board. It is also possible to integrate a boiler into the circuit to heat water. The advantages of water heating are very even heat and the option of preheating the engine. Some appliances can be integrated into a complete A/C system.

Key facts

  • Compact size
  • Diesel or HVO as fuel
  • Efficient and low emission
  • Very quiet
  • Many installation variants
HVH Webasto Arctic Expedition Sailboat Climate Systems Partnership

Product overview marine water heaters

  • Thermo Top Evo / Thermo Top Pro 50 (Marine)

    Thermo Top Evo and Thermo Top Pro 50 marine water heaters provide up to 5 kW of compact, quiet diesel heating and hot water for boats, OEM-ready
    Thermo Top Pro 50 compact hydronic heater on a technical thermal network backdrop, reflecting Webasto's expertise in vehicle heating and thermal management. Thermo Top Pro 50 diesel heater module - Webasto vehicle heating
  • Thermo Pro 90 / Thermo Pro 90 Chiller (Marine)

    Webasto Thermo Pro 90 (Chiller) marine water heater delivers quiet, compact 1.8–9.1 kW heating for yachts and motorboats, engineered for reliable everyday use
    Compact auxiliary heater with integrated pump and control module on orange technical background, illustrating Webasto's vehicle thermal management capabilities. Webasto Thermo Pro 90 High-Voltage Electric Heater Header
  • Thermo Top Pro 120/150 (Marine)

    Webasto Thermo Top Pro 120/150 marine water heaters: compact, quiet high-performance heating up to 12/15 kW for yachts, compatible with diesel and HVO
    Thermo Top Pro 120/150 liquid heater on technical backdrop, illustrating Webasto's high-efficiency auxiliary heating and vehicle thermal-management systems. Webasto heater unit on orange digital tech background

Integrated heat exchanger for boats

The HTX heat exchanger product line offers a wide range of installation options. With four heating output classes between 3.3 and 6.6 kW, as well as a wide range of accessories and installation kits, you can customize to fit your application need. Durable, highly efficient fans and blowers provide a strong and constant air flow, ensuring optimum air distribution. High-quality, automotive-grade components guarantee reliability and a long service life.

Key facts

  • Simple installation
  • Fast heating up
  • Reliable dehumidification of the cabin
Misty-sea sailboat on open water illustrating Webasto marine solutions, highlighting dependable thermal management and electrification for leisure boats. Webasto Marine Solutions - Sailboat Navigating Misty Open Waters

Product overview marine integrated heat exchangers

  • Integrated heat exchangers HTX 3.3 - 6.6 kW

    Webasto HTX integrated heat exchangers convert engine coolant waste heat into efficient vehicle heating (3.3–6.6 kW) with compact, flexible integration
    Integrated Heat Exchanger HTX on blue background, highlighting Webasto’s compact thermal management solution for vehicle electrification and HVAC integration. Integrated Heat Exchanger HTX - Webasto compact thermal module

Heating solutions for e-boats

For battery electric boats, Webasto offers extremely efficient high-voltage heaters (HVH) with heating outputs between 5 and 12 kW. With their clever stratified heating technology, the HVHs convert direct current into heat with virtually no loss. All models are ISO 21434-compliant, but differ in terms of voltage, communication interfaces and service life. Thanks to their extremely compact design, the HVHs require very little installation space. They can heat both the cabin and the drive batteries, thus increasing their service life and range.

Key facts

  • Efficient heating layer technology
  • Extremely compact design
  • No rare earths
  • Increases battery life and range
  • Flexible installation positions
  • Long service life between 12,000 and 25,000 operating hours
HVH Webasto Marine Systems for Luxury Yacht Cruising and Comfort

Product overview heaters for e-boats

  • 400 Volt High Voltage Heater

    Webasto HVH 50/70 high-voltage heater for 400 V EVs — compact, >95% efficient coolant heater delivering 5–7 kW with fast heat-up and precise thermal management
    HVH 50/70 high-voltage heater on orange technical backdrop, presenting Webasto's compact electric heater module with HV connectors for EV thermal management. Webasto HVH 50/70 high-voltage heater module for e-vehicles
  • 800 Volt High Voltage Heater

    800 V High Voltage Heater (HVH) - compact, efficient DC heaters up to 12 kW for commercial EVs, rapid cabin & battery conditioning, ISO 21434 safety
    HVH 100 Compact and HVH 120 high-voltage heaters on a technical orange backdrop, representing Webasto thermal management solutions for electrified vehicles. Webasto HVH 800 Volt high-voltage heater module header image

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