This can be the leading cause for foul HVAC odors for many homeowners, which raises concerns about indoor air quality. Another indicator of an indoor air quality problem is the smell of dirty socks. Although this smell may be coming from the air conditioning unit, it is not actually the unit that is the problem.
Device. 1  Ratchet (device), a mechanical device that allows movement in only one direction. 2  Ratchet, a tool also known as a socket wrench. 3  Ratchet (instrument), a type of music instrument.
A racket is used to play tennis, badminton, or squash, and it can also be spelled racquet. Another definition of racket is an unpleasantly loud noise; if your neighbors were playing horrible, loud music, you could yell out the window, Stop that racket! Informally, the word racket also means illegal scheme, especially for making money. The French word requette means palm of the hand, and racquet originally referred to a tennis-like game played by hitting a ball with the hand.