It is a common method to install a mechanical ventilation system or a system that has some kind of forced ventilation to control the temperature and pressure of air flowing in and out of the building. These systems are generally used for large homes or commercial buildings or some place where there is lack of fresh air
The airflow in the mechanical ventilation system is possible because of the duct system installed in attics,ceilings, basement, floors etc.
Ductwork design and installation can be a really complex process and will require complete attention on the design of the system,the correct size of duct for the building or house,materials used to make up ductwork and an accurate understanding of the heating and cooling load calculations.
With a properly planned out and installed duct system, it can last 12-15 years , and providing it with regular maintenance services and changing the filter once every three weeks will guarantee you an efficient working system by increasing its work life.
The HVAC system installed in modern buildings and homes is designed to provide: Fresh and conditioned air, Balanced indoor temperature for thermal comfort and Regulating humidity levels inside the rooms and all this is regulated through a system of ducts which makes the airflow possible.