Espar Airtronic M3 B4L Gasoline Heater

The Espar Airtronic M3 B4L is a powerful and efficient 12V gasoline heater designed for vans, RVs, trucks, sleeper cabs, and other larger mobile applications. Its 4 kW heating output provides fast, reliable warmth while maintaining low fuel and electrical consumption for extended use.

The M3 B4L features built-in altitude compensation up to 18,000 ft (5,500 m), eliminating the need for an additional altitude module. Its brushless motor, integrated controls, and self-diagnostic system provide reliable operation with easy maintenance.

Features

• 4 kW / 13,648 BTU/h heating output.
• Built-in altitude compensation up to 18,000 ft (5,500 m).
• Low fuel and electrical consumption.
• Four heating output levels for precise temperature control.
• Brushless motor with an extended service life of up to 5,000 hours.
• Integrated control unit and self-diagnostics.
• Quick-release cover for easy maintenance access.
• EPA verified and CARB compliant for use throughout North America.
• 2-year limited warranty.

Kit Contents

• Eberspächer Airtronic M3 B4L 12V gasoline heater.
• EasyStart Pro controller.
• Fuel metering pump, fuel line and clamps.
• Wiring harnesses.
• Stainless steel exhaust pipe.
• Combustion intake pipe.
• 0.5 m flexible ducting.
• Outlet grille and 90 mm straight air outlet hood.
• Screws, clips and plastic straps required for installation.
• Installation manual.
• Warranty documentation.

Specifications

• Fuel Type: Gasoline
• Voltage: 12V
• Maximum Power: 4 kW
• BTU Output: 13,648 BTU/h
• Altitude Compensation: Up to 5,500 m / 18,000 ft
• Rated Power Consumption: 39 W
• Fuel Consumption: 0.1–0.49 L/h
• Dimensions (L × W × H): 376 × 140 × 150 mm / 14.8 × 5.5 × 5.9 in
• Weight: 4.5 kg / 9.9 lb