Proheat M-Series
Ultra-Powerful Coolant
Heater for Demanding Transit Environments

With up to 125,000 BTU of output, the Proheat M-Series is an ultra-powerful, cold weather auxiliary heating solution for buses and coaches. This diesel-powered heater preheats the engine to ensure quick and reliable starts while reducing engine wear. Proheat M-Series heaters are also powerful enough to supply supplemental interior heat for passenger and driver comfort while the main engine is running. The heater is designed to be accessible and easily serviced by technicians to help minimize down time. CAN Bus connectivity means the heater can be seamlessly installed on vehicles that rely on the J1939 network standard. Trusted in the transit industry for years, Proheat M-Series heaters are installed on buses and coaches across North America.


M-Series Kit



Proheat M-Series Heater


1 Engine   3 Return to Engine   5 Fan
2 Proheat M-Series   4 Supply from Proheat      







Heater Features
  • Diesel-powered coolant heater
  • Produces 50,000/125,000 BTU/hr (15/37kW)
  • CAN Bus/J1939 connectivity
  • Engine preheat reduces start-up wear and tear
  • Generates supplemental heat for drivers and passengers
  • Optional control of an external coolant pump
New Features
  • Standard J1939 CAN Bus
  • USB connectivity
  • Integrated diagnostic indicator
  • Diaphragm compressor
  • Dual mode temperature
  • sensor
Optional Components
  • Datalink diagnostic software
Two Year Warranty
Proheat M-Series 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.



Downloadable Documents