Flexible Installation with 90° Tilt to Either Side
The design of the Airtronic B4L units allows for flexible installation options to fit a variety of spatial configurations and user preferences. With the ability to tilt the unit 90 degrees to either side, it can be positioned to direct heat exactly where it’s needed most. The heater can be mounted directly in the cab, on the floor, or in the rear cargo panel of the vehicle without extensive modifications.


Extended Operational Lifespan
The Airtronic B4L has an impressive operational lifespan of up to 5,000 hours, thanks to its advanced brushless motor technology. This technology ensures reduced wear on the motor during frequent usage which also reduces maintenance frequency and replacement. It’s the perfect air heater for users who require consistent uptime and performance.
The Airtronic B4L automatically adjusts to altitude, ensuring efficient performance and heat output at heights up to 5500 meters, ideal for mountainous regions.
The Airtronic B4L offers a quiet, stepless blower for smooth airflow and even temperature distribution.

The Airtronic B4L offers customizable heating settings, easy scheduling, and remote access via EasyStart Pro and EasyStart Web from any location.

Sensor-controlled Start-up Sequence
The Airtronic B4L incorporates sensor-controlled technology measures environmental parameters that optimizes start-up sequences. This ensures the device operates under the most favourable conditions, enhancing efficiency and performance from the moment it is powered on. The Espar Airtronic continuously monitors temperature, humidity, and load conditions, to adjust the start-up process for smoother operation and reduced wear and tear on components.
Advantages:
The Espar Airtronic B4L gasoline air heater offers efficient, versatile heating with automatic altitude adjustment, low power consumption, and flexible installation for various vehicles and applications. Other benefits include:
- High heating power, yet compact designÂ
- Automatic altitude adjustment up to 5500 m*Â
- Patented housing design for improved plagiarism protectionÂ
- Backward compatibility with carry-over connections
- Optimized heat air flow due to improved heat exchanger
- Compatibility with all other control units •Â
- Diagnostics and parameter assignment via EasyScan
- Can also be integrated into on-board systems via CAN (12/24V), LIN (12V), S+(12/24V) interfaces