Air conditioning ducts and ducts are a type of pipe or tunnel used to distribute air from the air conditioning system in a structure or building. Duct systems, known as duct systems, are the core component of a building's heating, ventilation, and air conditioning (HVAC) system. In most air conditioners, there is only one set of ducts, used for cold air in summer and warm air in winter, as the air is needed for general ventilation purposes. Ducts are only used with large central air conditioners and are not required for homes or small offices that use split systems or ductless air conditioners.
air conditioning ducts are selected according to size, shape, and material. A duct's size is based on the air pressure in the home or office space, the type of HVAC equipment used, and the cooling needs of the occupants. Round ducts are considered the most efficient as they allow a higher volume of air movement per duct unit, but are rarely used. Instead, builders and HVAC installers prefer square or rectangular ducts that are easier to fit into the 'snarrow ceiling and wall cavities. Convoluted ducts resembling corrugated tubing are often chosen for their attractive appearance when the coiled ducts are exposed or painted to blend in with the environment.
This system of ducts, which carries cold air from the air conditioner to each room, is called the supply duct.
To regulate the air pressure in each room, some air must be removed to make room for the new cold air intake. The second set of air conditioning ducts, called the return air duct, is used to extract the warmer air from each room and transport it back to the air conditioner for cooling. The air enters the recirculation ducts through exhaust grilles or registers in each room and then returns to the central air conditioning system where it is re-cooled for redistribution or discharged to the outside of the building and exchanged for fresh air.