If the air inside your house is dusty, it might mean your air conditioning ducts have sprung leaks.
If you’re changing your air conditioner filter every month, it will trap dust and pollutants that get into the indoor air so they never make their way into the duct system—or back into the air.
But if the ducts have tiny holes or cracks or joints that aren’t well-sealed, dust can bypass the filter and sneak directly into the ducts. Once it gets in there, the duct system will blow it all over the house.
Dust in the ducts and in the air can raise the temperature in your home and force your air conditioning system to operate inefficiently and struggle to keep your home cool during the summer.