The Total Truck Heat System from Idle Free Systems Inc. completely eliminates the need for discretionary idling in cold weather conditions. The system consists of a coolant heater and an auxiliary AGM battery that work together to provide heat for both the truck’s sleeper bunk and the engine. The Total Truck Heat system includes an independent auxiliary battery. This feature separates the Total Truck Heat system from the truck’s electrical system and never places the truck in a condition where it will not start.