The heart of the D-2/45 is a 9.0 liter 325 horse power John Deere diesel engine which propels twin 45" fixed steel axial flow fans. The D-2/45 has a proven track record of performance even in the deep south of Georgia where the trees can reach up as high as 120 feet! Quality design, engineering, craftsmanship, and service, this is Air-O-Fan's foundation and we shoot for the moon! Thank you for your valued support.