Just because a dryer costs more does not mean that it is the right model for your needs. Nevertheless, it is still a big investment, so make an informed decision before you buy. The first thing to do is to become familiar with the terms used to compare dryers. This can be changed easily by narrowing the opening the air comes out of, similar to putting one's finger over the end of a garden hose to increase the force of the water stream.
Fans generate airflow.
There are two basic kinds of fans in use today. One is the blower wheel, which is a flat disc with protruding vanes. It takes up less space but needs to be cleaned frequently, or it will become unbalanced and create excessive noise and wear out the motor bearing. The other is a paddle type fan, in which a number of flat surfaces are positioned perpendicular to the hub. Paddle fans require a larger housing but provide greater airflow and smoother operation.