HVAC Filter: lifespan, maintenance and replacement

Typical lifespan: 1–3 months (about 0.25 years).

Maintenance schedule

• Check filter condition — Monthly
• Replace disposable filter — Every 1–3 months
• Clean reusable filter — Monthly

Signs it needs replacing

• Filter is visibly dirty or gray
• Reduced airflow from vents
• More dust accumulation in home
• Allergy symptoms worsening
• HVAC running longer cycles

Tips

Higher MERV ratings catch more particles but may reduce airflow. MERV 8–11 is ideal for most homes.