These air dryer guns work with water-borne paints in particular, but also solvent-based materials can be dried rapidly by blowing air at the coated surface. They are especially suitable for the dry-blowing of smaller surfaces such as doors or fenders. The compressed air required for the dry-blowing is supplied at the air connection. By opening the inline air regulator, the blowing process is initiated. The air streaming through the specially shaped blowing slits causes an underpressure which sucks in more air through the filter. The sucked in air is cleaned by the stainless steel sieve.