When it comes to maintaining a comfortable and healthy indoor environment, your furnace air filter plays an important role. Some of the questions we hear most often include what kind of filter to use, and how often filters should be replaced or cleaned.
Here are are five essential things you need to know about furnace air filters to optimize HVAC system performance and keep the air clean in your home.
How Ofter Should Furnace Filters Be Replaced? The Importance of Regular Replacement
Over time, furnace air filters collect dust, pollen, pet dander, and other airborne particles. As a result the filter will gradually become clogged, reducing airflow. This forces your furnace to work harder. This will not only increase energy consumption, it can also lead to premature wear and tear on the internal parts of the furnace. Most experts recommend replacing disposable filters every 1-3 months, while washable filters should be cleaned on a similar schedule. However, if pet dander and excessive dust are an issue in your home, the replacement schedule may be shorter and you should inspect the condition of the filter regulararly.
Check with the filter manufacturer for the replacement or cleaning interval for your particular filter.
Different Types of Filters Explained
Furnace air filters come in various types, each with its own set of advantages and disadvantages:
Disposable Fiberglass Filters
These are the most common type and least expensive. They are effective for blocking large dust particles. However, they might not be the best choice for filtering out smaller particles like pollen or mold spores.
Pleated Filters
Made from polyester or cotton paper, these filters can trap smaller particles and are more efficient than fiberglass filters. Because they are denser and trap smaller particles, it’s important to replace the filter as recommended by the manufacturer to avoid restricting airflow.
HEPA Filters
High-Efficiency Particulate Air (HEPA) filters can capture at least 99.97% of particles 0.3 microns in diameter, making them ideal for households with allergy sufferers. They cost more, but will do a more effective job of keeping the air clean.
Washable Filters
If you’re replacing disposable filters frequently, reusable filters and can be a cost-effective choice in the long run. However, they need regular cleaning to maintain efficiency, which requires more time than simply swapping out a filter with a new one.
MERV Ratings Matter
The Minimum Efficiency Reporting Value (MERV) rating indicates a filter’s ability to capture and hold particles and pollutants. Ratings range from 1 (least efficient) to 20 (most efficient). For residential furnaces, a MERV rating between 8 and 11 is typically sufficient. However, if someone in the household has respiratory issues or allergies, consider using a filter with a higher MERV rating.
Do Furnace Filters Improve Indoor Air Quality?
The main purpose of a furnace filter is to keep dirty air from damaging the heating system. However, a clean and efficient furnace air filter can improve indoor air quality to some degree. By trapping pollutants, it prevents them from recirculating in your home. This is especially crucial for households with pets or sources of indoor air pollution.
If you are concerned about particulate matter in your home, a quality HEPA filter or indoor air cleaner will do a better job of reducing the risk of respiratory issues and allergies caused by indoor air pollution.
See related: Do Air Conditioners Filter Wildfire Smoke?
Cost vs. Value
While it might be tempting to opt for the cheapest filter available, investing in a higher-quality HEPA filter can lead to energy savings, a longer-lasting furnace, and improved indoor air quality.
Whichever type of filter you decide to use, we recommend keeping a 3 to 6-month supply near the furnace as a reminder and writing the replacement date on the side of the filter.
Furnace air filters are more than just a routine maintenance item; they’re a crucial component in ensuring a healthy and comfortable living environment. If you have questions about your heating system or are experiencing poor indoor air quality, call the experts at Central Heating Cooling Plumbing and Electrical. Your Comfort Is Our Central Concern.