The answer to 'when to service duct cleaning' is that you should have your home's ductwork professionally cleaned every 3-5 years, or more frequently if you have pets, smoke indoors, or notice increased dust or allergens. Proper duct cleaning helps improve indoor air quality, reduce energy costs, and extend the life of your HVAC system.
Duct cleaning involves using specialized equipment to dislodge and remove built-up dust, debris, and contaminants from the interior surfaces of your home's ductwork. This process improves airflow and reduces the circulation of allergens, pet dander, and other pollutants throughout your home.