A pleated Medium Efficiency Filter is a type of air filter commonly used in heating, ventilation, and air conditioning (HVAC) systems. These filters are made up of pleated layers of filter media and are designed to remove and trap airborne contaminants like dirt, dust, and allergens from the air passing through the HVAC system. The use of pleated medium efficiency filters offer several advantages, including:

1. Increased Surface Area: Pleated filters have more surface area than flat panel filters, due to their pleated design. This means that they can capture more airborne contaminants, resulting in a better air quality.
2. Higher Efficiency: Pleated medium efficiency filters are designed to capture small particles that would normally pass through flat panel filters, such as pollen, mold spores, and bacteria. The high-efficiency rating means that they are capable of removing up to 95% of airborne particles, depending on the filter rating.
3. Longer Lifespan: The pleated design of the medium efficiency filters allows for more filter media to be packed into a smaller area, making them last longer than flat panel filters. This reduces the frequency of filter replacement, saving costs for the user.
4. Better Airflow: Pleated medium efficiency filters have a lower resistance to airflow than flat panel filters, allowing the fan in the HVAC system to operate more efficiently. This results in better energy efficiency, contributing to energy savings over time.