What is the wattage of the ghd hairdryers? September 23, 2019 09:16 Updated Our most powerful hairdryer is the ghd air® with a wattage of 1600w. Related articles What is the difference between the ghd hair dryers? Is ghd glide universal voltage? ghd air® hair dryer Which hairdryer can I use the air diffuser with? How do I claim on my warranty?