How does an APU compare to idling in terms of pollution?

An auxiliary power unit (APU) is designed to provide energy for various functions in a truck without needing to idle the main engine. When compared to idling, an APU significantly reduces pollution emissions.

Idling a truck's main engine results in a considerable amount of exhaust emissions, which include harmful pollutants such as nitrogen oxides, particulate matter, and carbon dioxide. In contrast, an APU operates more efficiently and produces fewer emissions. It uses less fuel to generate the necessary power for heating, cooling, and electrical needs, thereby minimizing the environmental footprint.

Furthermore, regulatory guidelines in many areas encourage the use of APUs due to their lower emissions profile compared to continued engine idling. This has led to wider adoption of APUs in the trucking industry as a means of promoting sustainable practices and reducing overall vehicle emissions.