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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

    The Air Top Pro 25 is ideal for various vehicles, offering powerful heating, reliability, and efficient temperature control. Available early 2026, it features reduced power consumption and versatile installation.
    Header of Productpage for Air Top Pro 25 Air Top Pro 25 Header
  • Air Top Evo 40/55 (Marine)

    The air heaters for yachts and larger boats. Depending on the air distribution, they heat the saloon and all cabins. Thanks to smart blower control and fuel pump, they are efficient in terms of power and fuel consumption.
    Air Top Evo 40/55  product picture on orange background Air Top Evo 40/55 header
  • Air Top 2000 STC (Marine)

    The "all-rounder" among air heaters with 2 kW heating power for small and medium-sized boats - compact, safe and extremely efficient in terms of fuel consumption.
    Air Top 2000 STC air heater product picture on orange background Air Top 2000 STC header

Water heaters for boats

Our water heaters come in various 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 Enjoy a day on the ship for the things of Spain

Product overview marine water heaters

  • Air Top 2000 STC (Marine)

    The "all-rounder" among air heaters with 2 kW heating power for small and medium-sized boats - compact, safe and extremely efficient in terms of fuel consumption.
    Air Top 2000 STC air heater product picture on orange background Air Top 2000 STC header
  • Air Top Evo 40/55 (Marine)

    The air heaters for yachts and larger boats. Depending on the air distribution, they heat the saloon and all cabins. Thanks to smart blower control and fuel pump, they are efficient in terms of power and fuel consumption.
    Air Top Evo 40/55  product picture on orange background Air Top Evo 40/55 header
  • Thermo Pro 50 Eco (Marine)

    The compact water heaters heat with up to 5 kW. The heat reaches the various areas of the boat via radiators. The appliances also provide hot water in the shower and onboard kitchen.
    picture of Thermo Top Pro 50 Top header Thermo Top Pro 50 Top header
  • Thermo Pro 90 / Thermo Pro 90 Chiller (Marine)

    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.
    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)

    The new generation of water heaters with up to 12 and 15 kW of heating power. Whether in long sailing or motor yachts - these heaters always reliably guarantee optimum warmth on board.
    Thermo Top Pro 120 / 150 product picture on orange background Thermo Top Pro 120/150 header

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

    HVH 50/70: The powerful electric High Voltage Heater (HVH) with up to 5 or 7 kW heating power, ideal for 400 Volt systems in electric cars, transporters and specialty vehicles.
    HVH 50/70 product picture on orange background HVH 50/70 header
  • 800 Volt High Voltage Heater

    HVH 100 Compact / HVH 100 Compact+ / HVH 120: The perfect heating system for large plug-in hybrids and electric vehicles, strong heating power, high efficiency and reliable safety.
    Product picture of HVH 100 Compact and HVH 120 on orange background HVH 800 Volt header

Downloads

Marine - Catalog

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23 MB
Format
application/pdf
Download

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Further vehicle solutions

  • Recreational vehicles

    Efficient heaters for motorhomes, caravans and camper vans – perfect for retrofitting and original equipment.
    Recreational vehicle on a mountain road with schematic RV outlines and HVAC icons highlighting Webasto thermal and comfort systems for vehicle-solutions content. Webasto system partner for integrated thermal solutions in motorhomes
  • Light and medium duty vehicles

    High-performance Webasto solutions for light and medium duty vehicles: idle-free heaters and superior cooling systems engineered for peak mobile climate control.
    Webasto system partner delivering integrated thermal and HVAC solutions for light commercial vans, highlighting cabin and battery thermal management for OEMs. Webasto Commercial Vehicle Solutions – Van Thermal Management
  • Specialty vehicles

    Webasto provides advanced heating and air‑conditioning solutions for specialty vehicles—including ambulances, rescue units, fire engines, and other emergency vehicles—delivering reliable climate control that supports crews and patients in demanding conditions.
    Webasto thermal management ambulance concept illustrating integrated HVAC, interior climate control and system partner solutions for emergency vehicles. Webasto Emergency Vehicle Climate and Air Filtration Systems
  • Heavy-duty truck

    Webasto is a proven leader in engine-off heating and air-conditioning for heavy-duty trucks. Our systems improve aftertreatment performance, reduce idle time and fuel use, and help minimize engine wear – all while keeping drivers comfortable in cold climates.
    Highway semi at sunset with split warm/cool overlay and thermal schematics highlighting Webasto as systems partner for US truck heating and cooling systems. Webasto US Truck Heating & Cooling - Vehicle Solutions
  • Schoolbus

    Webasto provides heating systems for all school bus types – including electric buses – for a safe journey at all times.
    School bus in winter with thermal and airflow schematics illustrating Webasto vehicle solutions for commercial buses, highlighting heating and thermal management Webasto School Bus Thermal Solutions - Vehicle Solutions
  • Construction machinery

    Off-highway operators in construction, agriculture, mining, and material handling are under pressure from rising fuel costs, strict emissions rules, and tough working conditions. Webasto delivers a full range of fuel-based, integrated, and electric thermal solutions that cut operating costs, boost efficiency, and keep operators comfortable.
    Crane trucks in the construction of a bridge Crane trucks in the construction of a bridge
  • Agricultural machinery

    Off-highway operators in construction, agriculture, mining, and material handling are under pressure from rising fuel costs, strict emissions rules, and tough working conditions. Webasto delivers a full range of fuel-based, integrated, and electric thermal solutions that cut operating costs, boost efficiency, and keep operators comfortable.
    Blue tractor with red harrow in field positions Webasto as system partner for agricultural vehicles, highlighting thermal systems and electrification solutions. Webasto Vehicle Solutions – Agricultural Tractor Illustration
  • Defense

    Webasto delivers advanced climate solutions for defense vehicles and shelters. Our modular systems provide reliable heating, cooling, and air filtration, ensuring comfort and operational readiness in any environment.
    Webasto vehicle solutions for defense showcasing integrated thermal management and containerized climate systems for armored vehicles and mobile shelters. Webasto Military Vehicle Thermal Management and Shelter Solutions
  • Oil & gas industry vehicles

    Webasto provides reliable engine-off heating solutions to keep oilfield fleets running efficiently in extreme cold.
    Aerial view of a remote off-grid work camp with modular units and vehicles, highlighting Webasto system partnership in electrification and thermal management. Webasto remote site heating and electrification solutions for fleets