When you move into a new home, there is no way of knowing how clean the previous tenants kept the house. This includes the air ducts within the home. There may be a buildup of dust and debris within your air vents. When you move into a new home it's   a good idea to start fresh by hiring professionals for HVAC air duct cleaning.  

It is recommended that a household duct system should be professionally cleaned at least every two to five years. To increase the amount of time in between necessary cleanings, it is also important to change out the filters twice a year and clean and maintain the air ducts properly throughout the year.  

Dirty air duct covers are a sign that there is dust, dirt, or debris buildup in your vents. It is recommended that you walk around your house every month and check for dirty air duct covers. When you notice them, it's likely that you need professional HVAC air duct cleaning.  

Typically, HVAC air duct systems should be fairly silent when they are running. If you hear any sort of banging or rattling, it could be symbolizing an issue with your HVAC system. It’s important to call a professional team for HVAC cleaning as soon as you notice any strange noises coming from your system.