Espar AM3-B4L Commercial - Petrol

The Espar Airtronic AM3-B4L Commercial is Eberspaecher's most capable petrol air heater — sold as a heater and installation kit for fleet operators and installers who supply their own controller and fuel pickup.

With a 5,000-hour brushless motor, built-in altitude compensation up to 18,000 ft, and a 2-year / 2,000-hour warranty, this is the unit serious commercial installers specify.

⚠️ Controller and Fuel Pick-Up Tube not included. Add EasyStart Pro (PN 22.1000.70.2200) and Fuel Pick-Up Pipe (PN 20.2900.20.2010) separately, or call us at 800.837.3900 for help.

Why the AM3-B4L?

• 4 kW output — powerful enough to heat a full-size cargo van or camper in sub-zero temps
• Brushless motor — extended 5,000-hour service life and noticeably quieter operation than previous generations
• Built-in altitude adjustment — works up to 5,500m / 18,000 ft with no additional module required
• Improved fuel metering pump acoustics — runs cleaner and quieter than the outgoing model
• Runs on gasoline/petrol — draws directly from the vehicle's existing fuel tank
• 2-year / 2,000-hour warranty — backed by Eberspaecher's manufacturer warranty

Specs

• Fuel Type: Gasoline / Petrol
• Voltage: 12V
• Max Heat Output: 4 kW
• Altitude Rating: Up to 5,500m / 18,000 ft (built-in)
• Warranty: 2 years / 2,000 hours
• Part Number: 20.2820.30.0400

What's Included

• Eberspaecher Airtronic AM3-B4L 12V Heater
• Fuel Metering Pump
• Fuel Line & Clamps
• Fuel Pick-Up Pipe
• Wire Harnesses
• Stainless Steel Exhaust Pipe
• Combustion Intake Pipe
• Flexible Ducting — 0.5 meter
• Outlet Grill
• Air Outlet Hood (90mm straight)
• Mounting Plate with Seals and Screws
• Screws, Clips, and Plastic Straps
• Installation Manual
• Warranty Documentation

Not included: EasyStart Pro Controller (PN 22.1000.70.2200) and Fuel Pick-Up Tube (PN 20.2900.20.2010). Call 800.837.3900 if you need help selecting the right accessories.

Ideal For

• Fleet vehicles and commercial installations
• Cargo vans, trucks, and campervans
• Mobile workshops and tool trucks
• Installers supplying their own controller

Questions about fitment or installation? We're here to help — reach out before you order and we'll make sure you get the right kit for your build.