The answer to 'cleaning schedule for air duct' is that most experts recommend having your air ducts professionally cleaned every 3 to 5 years, or more frequently if you have pets, smoke indoors, or notice visible dust buildup. Regular duct cleaning can improve indoor air quality, extend the lifespan of your HVAC system, and prevent potential health issues caused by dust, dander, and other airborne contaminants.
The exact cleaning schedule will depend on factors like the size of your home, the number of occupants, and your local climate. Some homeowners may need to clean their ducts more often, especially if they have severe allergies or asthma. It's best to have a professional HVAC technician inspect your ductwork and provide a recommended maintenance plan.