The answer to 'air duct pet stains' is that pet dander, hair, and urine can cause stains and odors in air ducts. Symptoms include visible staining, musty smells, and even respiratory issues for household members. The best solution is to have the air ducts professionally cleaned by a licensed HVAC technician.
Homeowners should not attempt to clean air ducts themselves, as improper techniques can spread contaminants and damage the ductwork. Professional duct cleaning services use specialized equipment and follow industry standards to thoroughly remove pet-related buildup and restore air quality.