The pressure drop of an air filter is a measure of the resistance to air passing through it. It is measured twice, once when the filter is brand new and again when it has been in service and is “loaded with trapped air pollutants”. As more particles are trapped, it becomes harder for air to pass through, resulting in an increase in filter pressure drop and a decrease in air flow. The BNX air filter has a MERV 13 rating that allows it to capture 93% of the particles suspended in the air without affecting air flow.
To reduce the potential negative effects that a charged filter can have on your air conditioning equipment, you should change filters frequently. The amount of air flow from the HVAC that slows down the filter equals the pressure drop in the filter. Highly efficient filters, such as HEPA, ULPA, and ASHRAE, tend to have a greater pressure drop since they use a quality filter medium that is excellent for capturing contaminants and fine particles. Over time, the filter can become too charged, resulting in zero airflow and extreme restriction.
The accepted pressure drop is different for each air conditioner or air treatment system, so you should always consult the manufacturer's guide before inserting the air filter and replacing it. The BNX MERV 13 air filter is 100% synthetic and electrostatically charged. It exceeds conventional fiberglass filters in performance and features the latest in electrostatic filtration technology to provide superior resistance to low airflow while maintaining the highest level of filtration. Many pleated HVAC air filters can still have a high MERV rating without drastically restricting airflow. When considering the pressure drop of a 20x25x1 BNX air filter, it is important to understand how it works and how it affects your HVAC system. The pressure drop of an air filter is determined by its MERV rating, which measures its ability to capture particles suspended in the air.
The higher the MERV rating, the more efficient the filter will be at capturing particles without drastically reducing airflow. The BNX MERV 13 air filter has been designed to provide superior resistance to low airflow while maintaining a high level of filtration. It is important to consult your manufacturer's guide before inserting an air filter and replacing it to ensure that you are not overcharging your system.
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