Shaking, rattling, and other strange noises from your air ducts is a clear sign of damaged or dirty ductwork. Rattling and clamoring sounds usually mean the ductwork is loose and not secured well enough. If you hear a whistling sound, this is most likely the results of air pass over and through holes and air leaks. Speak with a professional about duct cleaning, sealing, and insulating.
Hot and Cold Spots
Hot and cold spots, uneven temperatures, and airflow problems can indicate improper duct sizing, unbalanced supply/return flow, leaks, or obstructions.
Remember that duct systems are only one part of your overall heating, air-conditioning, and ventilation system. If your HVAC unit was improperly installed, it’s likely that your duct system was improperly sized as well.
In addition to choosing the right-sized HVAC system, it’s also important that ductwork is sized properly. Undersized ductwork can restrict airflow and cause other problems, such as higher energy bills and shorter system lifespans.
Just like heat pumps and other HVAC units, your ductwork must be properly sized and installed for maximum efficiency, airflow, and indoor air quality. If the indoor air handler is the heart, your ductwork are the arteries and veins.