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4" Air Filters
Need 4" air filters? You’re in the right place! AAS American Filters specializes in 4" pleated air filters that offer superior filtration, capturing more airborne particles while allowing for better airflow. These thicker filters are ideal for systems that require extended service life and less frequent changes. Finding high-quality 4" filters isn’t always easy, but with AAS, you can rest easy knowing your filters will be on their way to you within a week, so you can enjoy cleaner, fresher air in no time.
Available 4" Air Filters 211 Sizes
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Are 4-Inch Air Filters Right for Me?
Most HVAC systems commonly use 4-inch thick air filters. While thicker filters often offer better filtration and longer intervals between replacements, 4-inch filters are versatile and fit a wide range of systems, effectively capturing dust, dirt, and other airborne particles to protect your HVAC system.
To determine if a 4-inch filter is suitable for your system, check your current filter’s size. Some filters have dimensions printed on the side. If not, measure the longest side, the shorter side, and the thickness to see if a 4-inch filter will fit your system. Remember, when shopping, the size you need is the nominal size, which is the actual measured size rounded up to the nearest inch.
MERV Ratings: Which Filter Rating is Best for You?
When choosing HVAC filters for your home or office, it’s important to consider the MERV rating (Minimum Efficiency Reporting Value). This rating, developed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE), measures a filter’s ability to capture particles of various sizes.
Filters with higher MERV ratings provide superior filtration, removing more contaminants from the air. The ratings range from MERV 1 to MERV 20. For most homes, filters rated between MERV 8 and MERV 13 offer excellent protection against dust, pollen, mold spores, and other common airborne particles. If you have pets or someone in your home suffers from allergies, a MERV 11 filter is a great choice as it captures smaller particles like pet dander. For households with individuals who have asthma or severe allergies, or for those who want the highest level of filtration, MERV 13 filters can trap smoke, some bacteria, and viruses.
While higher MERV ratings provide better filtration, it’s important to ensure your HVAC system can handle the increased airflow resistance, especially with ratings of MERV 14 and above, which are typically reserved for healthcare facilities and environments requiring ultra-clean air. Using such filters in a residential system could strain the HVAC unit.