Webasto Air Top Pro 25 Heater

Quiet Diesel Parking Heater for Vans, RVs, and Work Vehicles

Stay warm through cold mornings and winter stops with fast heat-up, quiet overnight comfort, and efficient cabin heating. The Webasto Air Top Pro 25 delivers 2,400–8,500 BTU/hr (0.7–2.5 kW) of stepless heating power, automatic altitude adjustment, and broad vehicle compatibility for recreational and professional use.

Benefits & Use Cases

The Webasto Air Top Pro 25 is built for drivers, builders, and operators who need dependable heat without bulky equipment or loud overnight operation. In boost mode, it delivers up to 8,500 BTU/hr (2.5 kW) for fast warm-up, then uses stepless temperature-controlled regulation to maintain the selected cabin temperature.

• Wide heating range from 2,400–8,500 BTU/hr (0.7–2.5 kW) for mild nights and freezing conditions
• Constant 8,500 BTU/hr (2.5 kW) boost mode for up to 6 hours
• Whisper-quiet eco operation thanks to a new fan design and brushless EC drive
• Automatic altitude functionality up to 18,045 ft (5,500 m), with maximum heating output up to 9,843 ft (3,000 m)
• Compatible with CAN, LIN, and CI-Bus systems for modern vehicle integration
• Can be installed inside the vehicle or externally on the chassis

Vehicle Compatibility

• Camping vehicles, camper vans, and recreational vehicles
• Trucks, light commercial vehicles, and specialty vehicles
• Buses and passenger transport applications
• Boats and marine cabin heating installations
• Construction, agricultural, and off-highway machinery
• Vehicles transporting hazardous goods where ADR suitability is required

Technical Specifications

• Fuel Type: Diesel according to DIN EN 590; paraffinic fuel HVO/GTL according to DIN EN 15940; gasoline E0–E10 according to EN 228
• Voltage: Diesel 12V or 24V; gasoline 12V
• Heat Output: 2,400 - 6,800 BTU/hr control range with 8,500 BTU/hr boost (0.7–2.0 kW control range with 2.5 kW boost)
• Boost Duration: up to 6 hours at 8,500 BTU/hr (2.5 kW)
• Operating Temperature Range: -40 °F to 104 °F (-40 °C to +40 °C)
• Max Altitude: operation up to 18,045 ft (5,500 m); maximum heating output up to 9,843 ft (3,000 m)
• Dimensions: 12.6 × 5.0 × 4.9 in (321 × 127 × 124 mm)
• Weight: 6.5 lb (2.95 kg)
• Mechanical Interface: identical to Air Top 2000 STC
• Electrical Interface: 500 mm wiring harness with 8-pin connector and separate 1,000 mm dosing pump cable, or integrated wiring harness option
• Communication Interface: LIN, CAN, and CI-Bus
• Certifications: ECE R10, ECE R122, CE; cyber security according to ISO/SAE 21434; suitable for ADR use

Browse Webasto Manuals & Technical Documentation

FAQs

Is the Air Top Pro 25 suitable for high-altitude travel?
Yes, the heater supports operation up to 18,045 ft (5,500 m) and maximum heating output up to 9,843 ft (3,000 m). This makes it a strong option for mountain travel and winter routes.

Can I use this heater in a camper van or RV?
Yes, the Air Top Pro 25 is designed for camping vehicles, vans, RVs, light vehicles, and other mobile applications. Confirm voltage, fuel type, and mounting location before planning the install.

What controls can be used with the Air Top Pro 25?
Webasto lists compatibility with ThermoConnect, UniControl, Telestart, MultiControl, and a digital rotary selector. It also supports LIN, CAN, and CI-Bus communication for vehicle integration.

Can the Air Top Pro 25 be installed outside the vehicle?
Yes, Webasto states the air heater can be installed inside the vehicle or externally on the chassis. Final mounting should follow the official installation guidance when released.