Pronunciation: [dˈʌktləs] (IPA) 
Ductless is spelled with a silent "C", making it appear as if it should be pronounced "duck-tless". However, the correct pronunciation is "duhkt-luhs" with the stress on the second syllable. This can be explained through the International Phonetic Alphabet (IPA) transcription, which represents the pronunciation of words. In IPA, "ductless" is /ˈdʌktləs/, with the "K" sound in "dukt" being pronounced softly as a "T" sound.
Ductless is an adjective used to describe something that does not have or require ducts. The term primarily refers to a system or appliance that functions without a network of tubes for the distribution of air or other substances.
When referring to heating, ventilation, and air conditioning (HVAC) systems, a ductless system, also known as a ductless mini-split system, does not rely on a complex matrix of ductwork to deliver conditioned air. Instead, it consists of an outdoor compressor unit and one or more indoor air handling units that are mounted on walls or ceilings. These units are connected by refrigerant lines, allowing for individual temperature control in different zones of a building. By eliminating the need for ducts, ductless systems offer greater flexibility, energy efficiency, and easier installation compared to traditional HVAC systems.
In general, the term ductless can also be used to describe appliances or devices that do not require the use of ducts to function. This can include ductless hoods or range vents used in kitchens, which filter and recirculate air instead of venting it outside through a duct. Additionally, ductless dryers and exhaust fans may be used in homes or commercial spaces where a traditional duct system is not feasible or desired.
In summary, the term ductless refers to an item, system, or appliance that does not have or need ducts for its operation.
Having no duct, noting certain glands having only an internal secretion.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
The etymology of the word "ductless" can be understood by breaking it down into its constituent parts.
1. "Duct": The word "duct" is derived from the Latin term "ductus", which means "a leading" or "conduit". It refers to a tube or passage through which air or other substances can flow.
2. "-less": This suffix is used to indicate the absence or lack of something. It comes from Old English "-lēas" and is related to the German "-los" and Dutch "-loos".
When combining these elements, "ductless" is formed to indicate the absence or lack of ducts.
