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Heating solutions for
buses

Ready to run all year long - engine-heating solutions for school buses of every size​

Webasto provides efficient, powerful, and retrofittable heating technologies designed to keep school bus engines operating reliably in any season. Our coolant heaters deliver consistent engine pre‑heating to reduce idling, minimize cold‑start wear, and support optimal aftertreatment performance. For electric and hybrid platforms, Webasto high‑voltage heaters ensure stable thermal management to maintain system readiness and protect critical components.

Heating solutions for fuel-powered school buses

Webasto is a global leader in engine‑off heating solutions, trusted by school districts and major bus fleets across North America for proven reliability and performance. Our coolant heaters reduce unnecessary idling to lower fuel use and operating costs, while dependable engine pre‑heating minimizes cold‑start stress, protects after treatment systems, and helps prevent costly downtime. With Webasto heating solutions, school busfleets gain consistent performance, improved efficiency, and the confidence that their buses are ready to operate in any weather.

Bus on an icy road

Engineered for the Highest Standards​

Recognized worldwide for durable heating technologies and precision‑engineered components, Webasto supports school bus manufacturers and fleet operators with systems designed for long service life and dependable operation. As a trusted partner, we ensure ongoing spare‑parts availability and efficient service throughout the entire lifecycle of each bus—helping transportation departments minimize downtime and keep buses safely on the road.

Key facts

  • Engine pre-heating
  • Accelerated defrost
  • Idle reduction
  • Fuel savings
  • Reduce engine wear
  • Reduce emissions
Heated School Bus

Product overview coolant heaters for school buses

  • Thermo Top Pro 150

    The Thermo Top Pro 150 is a high-performance coolant heater with up to 51,000 BTU/h heating power. Ideal for heavy-duty applications with easy installation and altitude compensation.
    Thermo Top Pro 120 / 150 product picture on orange background Thermo Top Pro 120/150 header
  • Scholastic Pro 90

    Scholastic Pro 90 coolant heater delivers up to 9.1 kW, ensuring fast engine starts in school buses and minibuses—even in extreme Arctic and high-altitude conditions.
    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 E Plus 320

    The Webasto Thermo E+ 320 Engine Pre-Heater efficiently pre-conditions heavy machinery by circulating warmed coolant, preventing cold starts and reducing fuel use by up to 4.5%. With a compact design, brushless motor, and nozzle burner technology, it’s a smart solution for lower emissions, fuel savings, and reliable performance.
  • Air Top Evo 40/55

    The Air Top Evo 40/55 heater provides up to 19,000 BTU/h of powerful, efficient heating. Enjoy low fuel consumption and compact design for maximum comfort.
    Air Top Evo 40/55  product picture on orange background Air Top Evo 40/55 header
  • Air Top 2000 STC

    The Webasto Air Top 2000 STC offers efficient, quiet heating up to 7,000 BTU/h, reducing fuel costs and emissions while ensuring comfort in your vehicle.
    Air Top 2000 STC air heater product picture on orange background Air Top 2000 STC header

Heating solutions for electrically powered school buses​

Our extremely efficient high-voltage heaters (HVH) with heating outputs between 5 and 12 kW ensure pleasant temperatures in electric school buses. The space-saving devices convert electrical direct current into heat with virtually no losses (more than 95 percent). All models are ISO 21434-compliant, but differ in terms of voltage and communication interfaces. Electric high-voltage heaters from Webasto not only heat the front and passenger compartments, but can also provide optimum temperature control for traction batteries. This has a positive effect on their range and service life.

Key facts

  • Efficient heating layer technology
  • Extremely compact design
  • No rare earths
  • Support low voltages of 12 or 24 V
  • Heating in the high voltage range from 250 to 880 V
  • Increases battery life and range
  • Flexible installation positions
  • Long service life between 12,000 and 25,000 operating hours
  • Simple plug & play installation in series production
HVH Webasto School Bus Electrification – Vehicle Solutions

Product overview heaters for electrically powered buses

  • 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

School Bus - Brochure

Size
6 MB
Format
application/pdf
Download

Scholastic Pro 90 - Datasheet

Size
745 KB
Format
application/pdf
Download

Car makers

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Webasto supplies automotive manufacturers globally with roof, battery & thermo systems. Explore our solutions.

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End customers

Find your dealer

With the Webasto Dealer Locator you can find the closest Webasto contact and you can request an offer for your favoured product.

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Further vehicle solutions

  • 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
  • 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
  • Marine

    Webasto offers heaters, air-conditioning systems and roofs for sailboats, motorboats and yachts, individually configurable for every destination and boat size.
  • 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
  • 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
  • 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
  • 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
  • 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