Yes! I apply my makeup while my hair is air-drying and then use the hot air brush to smooth my hair. I do have fine, straight hair which dries rather quickly. I don't use the hot air brush to curl my hair, only to make it silky straight. I hope this answer helps you.
I've tried it on my dry hair and it tends to make it staticky. I dampen my hair slightly and then use it if I'm not doing a full wash. My hair is fine and straight, however. Curly or coarse hair may find different results.