How Often Should You Replace Your Furnace Filter?

How Often Should You Replace Your Furnace Filter?

Replacing your furnace filter is one of the simplest yet most important HVAC maintenance tasks. A clean filter ensures your system runs efficiently, helps maintain healthy indoor air, and extends the life of your furnace.

But how often should you replace it?

General Guidelines

• Standard filters (1–2 inches thick): Every 1–3 months
• Thicker filters (4–5 inches): Every 6–12 months
• HEPA or high-efficiency filters: Check every 2 months

These are just guidelines. You should also consider:

• Pets in the home: Pet hair and dander clog filters faster
• Allergies or asthma: Replace more frequently for cleaner air
• Usage frequency: More heating = faster buildup
• Local air quality: Dust, pollen, or wildfire smoke affect filter life

Why It Matters

Neglecting your furnace filter can lead to:

• Reduced airflow and efficiency
• Higher energy bills
• Poor indoor air quality
• Unnecessary strain on your system

At HVA Climate Control, we recommend checking your filter monthly and setting a reminder so it never slips your mind.

Need help with routine maintenance? Our team proudly serves Vancouver, WA, and Portland, OR with fast, friendly HVAC service.