An adjustable air amplifier has a continuously adjustable air gap so that the air quantity can be adjusted from a “breeze” to a “storm”. The adjustable air amplifiers are available in aluminum and stainless steel. The blowing force and air volume can be adjusted by twisting the exhaust ring to make the air gap larger or smaller. When the desired air quantity is reached, the exhaust ring can be secured with the knurled locking ring. In most cases, an air gap of 0.05 mm – 0.10 mm is sufficient.