Troubleshooting How do I use the concentrator on my Philips hair dryer? The concentrator on your Philips hairdryer is used to create smooth, sleek hair styles. To use the concentrator nozzle, follow these simple steps. How to use the concentrator nozzle: Attached the concentrator onto the head of your drier. Use the concentrator to direct the airflow at the brush or comb that you are using to style your hair. The narrower the opening of the nozzle, the faster the airflow, and a more precise styling result.