Maradyne 12 Volt Heater 15,000 BTU - Model 6000

2 or 24 Volt Hot Coolant Cab Heater. 15,000 BTU. Multi-speed fan control switch with dash-mount bracket. 5-blade aluminum fan blade. Tube & fin water coil with Lifetime warranty 7 1/2" W x 7 3/8" H x 7 1/8"

Maradyne 12 Volt heaters need a coolant line to be hooked up to the heater. Water to air heating systems, such as Maradyne, provide much larger heat output and are very efficient.