Proheat X45 Plus
Powerful & Rugged Auxiliary Coolant Heater Designed for School Buses

Proheat X45 Plus is a powerful, diesel-powered school bus pre-heating solution for quick and reliable cold weather starting. The heater becomes part of the school bus heating system, supplying added heat for passengers while reducing fuel costs and emissions from unnecessary engine idling. An integrated pump circulates heated coolant to warm the engine block, making starting easier while reducing start-up engine wear. Proheat X45 Plus features an onboard control panel that displays heater status, while an optional digital timer for inside the bus adds convenient timer-based starting of the heater. The heater also complies with National Highway Traffic Administration standards to ensure maximum safety for bus passengers. With more than 15 years in the field, its rugged and field serviceable design has proven reliable in even the most extreme temperatures.


X45 Plus Coach Kit


Proheat X45 School Bus Heater

1 Engine
2 Proheat X45 Plus
3 Return to Engine
4 Supply from Proheat
5 Fan
Proheat Timer
Optional Timer



An impact switch
automatically shuts
the heater off in the
event of a vehicle



Coolant Heater Features
  • 45,000 BTU (13kW)
  • Electronic control panel displays heater status
  • Integrated coolant pump
  • Flexible mounting options
  • Complies with National Highway Traffic Safety standard FMVSS 301 S5.5 and S5.6
Timer Features
  • Timed or manual start of X45 Plus heater from inside the vehicle
  • Easy-to-read digital display
  • Programmable, multi-event 7-day timer
  • Surface-mount design
Two Year Warranty
Proheat X45 Plus is backed by a two year parts and labor warranty and is supported by a network of Authorized Proheat Dealers across the United States and Canada. For specific terms, you can access our warranty through this link.