A motor-fan assembly includes an assembly housing which supports a motor assembly and a working fan assembly having a working fan rotated by the motor assembly which draws in and exhausts working air. The motor-fan assembly also includes a cooling fan assembly which provides a cooling fan rotated by the motor assembly that draws in and exhausts cooling air. The assembly housing has at least one of an inlet insert and an outlet insert through which working air or cooling air passes. The inserts are removable from the assembly housing.