The Cool Air Process 1.Schedule your free service inspection by booking an appointment online or by calling us any time, we’re available 24/7! 2.On your selected appointment day, one of our trained technicians will assess your unit to determine the right path for you. 3.It’s time to get your system running efficiently! After approving our dryer vent process, a technician from Cool Air USA will start the cleaning. 4.Cool Air USA will then provide you with a digital copy of your receipt including before and after photos to help explain the completed work.