Dual Construction A/C Line

The A/C line unit installed between the engine compartment and the evaporator is the dual construction type.

The discharge line (high pressure) is built inside the suction line (low pressure).

This design is effective for lowering refrigerant temperatures in the discharge line, which helps to improve cooling performance.

Fig 1: Identifying Dual Construction A/C Line

Courtesy of AMERICAN HONDA MOTOR CO., INC.