The pre-start engine heaters work independently from your motor.  These heaters warm up your engine coolant, circulating it throughout the engine keeping the engine warm.  Hot air is also supplied to the cabin compartment, maintaining a warm and comfortable space.
Additional ad-on feature: programmable start and stop via smartphone
 
Start your truck engine warming as you leave the cabin.  Easy start when you get there, and a warm cab!
 
Diesel  or gas powered
51,000 Max BTU
0.05-0.34 gal/hr
6.1-9.1 Amps
17.6 lbs