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If you discover a dead animal in your air ducts, address the issue promptly to prevent unpleasant odors and potential health hazards. Turn off your HVAC system to prevent further spread of contaminants and contact a professional HVAC technician or pest control specialist to remove the animal and clean the affected area. They have the tools and expertise to handle the situation, including removing and disinfecting contaminated ductwork. The technician will inspect the ducts for any damage or other issues that might have allowed the animal to enter.

You should have your air ducts cleaned every three to five years, according to the National Air Duct Cleaners Association (NADCA). Some methods that use brushes and cleaning agents tend to clean more thoroughly, meaning you can have the ductwork cleaned every six to eight years. If you spot warning signs like mold in the HVAC system or your home consistently dusting despite cleaning, you may need to service your air ducts sooner than expected.

HVAC systems push air around, causing dust and dirt to accumulate. Some dirt around air vents is normal, but if you notice a significant accumulation in a short time, that indicates a problem with the system. Clean the vent covers, replace the air filters, and call in a pro for an inspection.

It’s normal to hear a low humming sound as air moves through your vents. Most of the time, you probably won’t even notice it. However, if that sound becomes disruptive or if you hear more concerning noises (such as rattling, clicking, banging, hissing, or grinding), there might be a problem with your HVAC system.