The channel or distribution of air used to cool and heat your home is a collection tube that distributes heated or cooled air to the different rooms. This branch of rectangular or rectangular tubes, usually made of metal plates, fiberglass sheet or flexible plastic and the composite yarn is found in your home. The pipeline system is designed to provide "conditioned" air conditioning - it is heated or cooled by heating, ventilation, and air conditioning (HVAC) devices - and to circulate or return the same volume of air to the HVAC equipment.
Typical air duct systems lose 25-40% of the heat or cooling energy emitted by the cooling and heating system. Leaking, in a way that air conditioning is lost in the pipeline system, makes the HVAC system work harder, thus increasing your usage bill. In addition, duct leakage can reduce comfort and threaten your health and safety.
It is a channel system that has two main air delivery, delivery, and return systems. The supply side provides the air conditioning to the house through individual space records - the one you feel like blowing records. The return side goes into the air and delivers it to the air conditioning in its central system. All air aspirated into the return channel (s) is conditional and must be returned through the delivery records.