The Heatstar by Enerco 373-HS3500DF PORT HIGH PRES DIESEL DIRECT-FIRED HTR F151089 is a high performance portable heating unit that is perfect for use in a variety of applications. This unit is powered by a diesel engine and is capable of producing up to 3500 watts of heat. This unit is also equipped with a direct-fired heater that is perfect for use in applications that require high heat output. The Heatstar by Enerco 373-HS3500DF PORT HIGH PRES DIESEL DIRECT-FIRED HTR F151089 is a high performance portable heating unit that is perfect for use in a variety of applications. This unit is powered by a diesel engine and is capable of producing up to 3500 watts of heat. This unit is also equipped with a direct-fired heater that is perfect for use in applications that require high heat output.