How often you should change your air filter depends significantly on the type of filter you are using.
The key factor determining filter replacement frequency, as highlighted in the provided reference, is the filter's material and quality. Different filter types have varying lifespans and filtration capabilities.
Filter Type Matters
According to the reference, the material your air filter is made from directly impacts how frequently it needs to be replaced to maintain optimal performance and air quality in your home or building.
Here's a breakdown based on the reference:
| Filter Type | Recommended Change Frequency |
|---|---|
| Basic Fiberglass | Every 30 days |
| Higher-Quality Pleated | Every 90 days |
Understanding the Difference
- Basic Fiberglass Filters: These are often the most common and least expensive filters available. They typically have a low MERV (Minimum Efficiency Reporting Value) rating, meaning they primarily capture larger particles like dust and lint. Due to their simpler construction and lower particle retention capacity, they become clogged more quickly and require frequent replacement, specifically every 30 days, to ensure proper airflow and filtration.
- Higher-Quality Pleated Filters: These filters are constructed with folds (pleats) of material, providing a larger surface area to capture more particles, including smaller ones like mold spores, pet dander, and pollen. They generally have higher MERV ratings (often MERV 8 or higher). Their design allows them to hold more contaminants before airflow is significantly restricted. For this reason, they can last longer, typically recommended for replacement every 90 days, provided other factors don't necessitate earlier changes.
Adhering to these recommended schedules based on your specific filter type helps maintain your HVAC system's efficiency, improve indoor air quality, and potentially extend the lifespan of your equipment.
