Koch Filter 20X21X1FC Fan Coil Air Filter 1 Inch

Product Description

The KOCH FILTER 20X21X1FC is a 1-inch fan coil air filter built for exact-fit installation in fan coil units and air handler applications. With nominal dimensions of 20 x 21 x 1 inch and actual dimensions of 19-7/8 x 21-1/2 x 1 inch, this filter is designed to seat precisely in the filter track, preventing bypass air and maintaining proper coil-face coverage. It captures dust, lint, and airborne particulate from return air streams, protecting the coil surface and supporting system efficiency. Licensed HVAC technicians and facilities maintenance crews are the typical installers for this type of filter.

This filter is suited for residential and light commercial fan coil units and air handlers where a 1-inch filter slot is specified. It performs in return-air filtration applications where maintaining consistent airflow across the coil is critical to system performance. The exact actual dimensions of 19-7/8 x 21-1/2 x 1 inch make it appropriate for equipment requiring a close-tolerance fit rather than a standard nominal-size filter.

Key Features

• Exact actual dimensions of 19-7/8 x 21-1/2 x 1 inch for close-tolerance fan coil installation
• 1-inch depth fits standard 1-inch filter tracks in fan coil and air handler cabinets
• Captures dust, lint, and airborne particles from return air streams
• Designed to minimize bypass air around the filter frame
• Appropriate for residential and light commercial HVAC applications

Compatibility

Designed as an OEM-style replacement filter for fan coil units and air handlers requiring a 1-inch filter with actual dimensions of 19-7/8 x 21-1/2 x 1 inch.

Installation Notes

Installation is typically performed by licensed HVAC technicians or facilities maintenance personnel. Power down or shut off the fan coil unit at the disconnect before servicing the filter compartment. Confirm the actual filter dimensions match the equipment filter track before installation to ensure a proper seal and prevent air bypass. Follow the airflow direction arrow printed on the filter frame during installation.

Technical Specifications

• Nominal Size: 20 x 21 x 1 inches
• Actual Size: 19-7/8 x 21-1/2 x 1 inches
• Filter Depth: 1 inch
• Application: Fan Coil and Air Handler

Standard Information

• Brand: KOCH FILTER
• Manufacturer Part Number: 20X21X1FC