Which hairdryer can I use the air diffuser with? 16 September 2019 05:58 Updated The diffuser can only be used with the ghd air® hairdryer. Unfortunately, this will not work with the ghd flight®. Related articles ghd air® hair dryer What is the difference between the ghd hair dryers? How do I claim on my warranty? What is the wattage of the ghd hairdryers? There is a hole in my paddle brush, what is this for?