An air duct system can last for decades, but there are situations you may find yourself in that necessitate having a new duct system installed in your home. The following are a few reasons you may need your air duct system replaced.
Your air duct system is the wrong size
When a new heating unit is purchased, your existing duct system may not be compatible with it. You may have wanted more heat in your home or air in your home, so you purchased a unit with greater power. However, your old duct system is rated at a lower power. Your new HVAC unit will have greater stress placed upon it because of a lack of efficiency. The heat and air the HVAC is capable of delivering are not flowing. This places stress on the heat exchange, the motor, and the fan, to name just three components that could suffer from premature failure.
Your air duct system may not have been properly insulated
When a duct system has not been properly insulated for many years, it can develop corrosion. If there is enough of it throughout your system, you will need to replace everything, but if the corrosion is limited to a couple of areas, you may get by with replacing those sections. If the system looks good but there's not enough insulation, you can insulate your duct system properly without replacing everything. If it is properly insulated, and you are losing too much cold or hot air, you may need new insulation.
Your air duct system is not distributing air as desired
If you're getting too much airflow in certain areas of your home but not enough in others, your first thought may be to replace the air duct system. But it may be possible to modify your existing system without replacing everything. One way to do this is by increasing the size of the ducts leading to the rooms that are not getting enough air. It may be possible to relocate the duct closer to the air supply plenum. Another option may be to use a damper, which will reduce the amount of air to one side of your house, thereby increasing airflow to the other side. An HVAC technician can explore these options with you, but you still may need to replace the entire system.
Although an air duct system can last a long time, there are situations where you need to replace it. If you're installing a new HVAC unit, it should be compatible with the size of your air duct system. Although insulation is important, sometimes a duct system was never insulated properly to begin with. This can lead to corrosion, and everything will need replacing. When your air duct system is not distributing air properly, you may need a new one. There may be modifications available for your duct system, as an alternative to installing a new system. You should consult an HVAC technician about air duct installation.