Hot air

Hot air may refer to:


 * Heat
 * A lie, exaggeration, nonsense

In science and engineering

 * Hot air airship
 * Hot air balloon
 * Hot air boat
 * Hot air engine
 * Hot air gun
 * Hot air oven
 * Hot air reflow

In economics

 * Hot air (economics)

As a proper noun

 * Hot Air, an American conservative political blog
 * Hot Air (film), a 2019 American comedy-drama film directed by Frank Coraci
 * HOTAIR, a human gene (short for "HOX transcript antisense RNA")