The Air Top Evo 3900 is a larger version of the Air Top 2000 ST. For colder climates and/or larger spaces, this heater is what you need. Will work in extreme conditions (down to -20°F) in most cabs. The kit comes with everything you need to install.


  • Heating Power (btu/h): 5,100-13,300
  • Fuel: Diesel #1, #2, Arctic
  • Fuel Consumption (gal/h): 0.05-0.13
  • Rated Voltage (V): 12
  • Operating Voltage Range (V): 10.5 – 16
  • Rated Input (amps): 1.25 – 3.75
  • Airflow (cfm) 77.7


  • LxWxH (in) 16.65 x 5.83 x 6.375


  • 13 lbs

Visionaire Inc. does not service these heaters. Visionaire Inc. will not be held responsible for any damage to person or property due to improper maintenance or installation. For trouble shooting, or technical questions, please visit, or call 800-860-7866 to speak with Webasto’s technical department.