Filter Type: FCU filters can come in various types, such as flat panel filters, pleated filters, or extended surface filters. The filter type selected will impact the filtration efficiency and service life.

Efficiency Rating: FCU filters are available in different efficiency ratings, often measured using the Minimum Efficiency Reporting Value (MERV) scale. The MERV rating indicates the filter’s ability to capture particles of different sizes. Higher MERV ratings correspond to higher efficiency.

Filtration Media: The filtration media is the material that captures and retains particles. It is typically made from materials like fiberglass, synthetic fibers, or other filter media with varying degrees of filtration efficiency.

Filter Dimensions: FCU filters come in various sizes to fit different fan coil units and equipment. Common sizes include 24×24 inches, 20×20 inches, and other standard dimensions.

Frame and Construction: The filter is enclosed within a frame made of materials such as cardboard, plastic, or metal. The frame provides structural support and ensures proper fit within the filter slot.

Pressure Drop: Pressure drop, or resistance to airflow, is an important consideration. A balance must be struck between filtration efficiency and the impact on system airflow and energy consumption.

Initial Resistance: This refers to the resistance a new, clean filter presents to the airflow. It affects the initial performance of the HVAC system.

Final Resistance: Over time, as an FCU filter captures particles, its resistance to airflow increases. The final resistance indicates the point at which the filter should be replaced to avoid excessive pressure drop and reduced system efficiency.

Change Frequency: The recommended filter change frequency varies based on factors such as the level of contamination, occupancy, and the specific environment. It’s important to follow manufacturer guidelines for replacement.

Applications: FCU filters are used in a variety of commercial and residential settings, including hotels, offices, apartments, and more.

Certifications: Some FCU filters may carry certifications from organizations like the American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) or the European Committee for Standardization (CEN).