How Often Should You Replace Your Furnace Filter?
A simple maintenance habit that keeps your system running efficiently all year. Here's what you need to know about furnace filter replacement.
Replacing your furnace filter is one of the simplest and most effective things you can do to maintain your HVAC system. Yet it's one of the most commonly overlooked tasks. Here's what you need to know.
How often should you change it? The general rule is every 1–3 months, but the right frequency depends on a few factors:
- Filter type: Basic 1-inch fiberglass filters need changing monthly. Higher-efficiency pleated filters can last 2–3 months. - Pets: Pet dander clogs filters faster. Change every 4–6 weeks if you have pets. - Allergies: If anyone in your home has allergies or asthma, change filters more frequently. - Home size and usage: Larger homes or systems that run constantly may need more frequent changes.
What happens if you don't change it? A clogged filter restricts airflow, which forces your system to work harder. This leads to higher energy bills, reduced comfort, and accelerated wear on your equipment.
The bottom line: Set a reminder to check your filter monthly. When it looks gray and clogged, replace it. It takes five minutes and can save you hundreds in repair costs.
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