Koch Filter P421225 Pleated Air Filter 12x25x2

Product Description

The KOCH FILTER P421225 is a pleated air filter designed for residential and light commercial HVAC systems requiring standard 2-inch depth filtration. Measuring 12 x 25 x 2 inches, this filter fits into standard filter tracks and return-air grilles where a 2-inch pleated media is specified. The pleated construction increases surface area compared to flat-panel filters, supporting improved particulate capture and longer service intervals between changeouts. HVAC technicians and facilities maintenance personnel install this filter as part of routine system maintenance to protect coils and blower components from airborne debris.

This filter is suited for forced-air heating and cooling systems in residential homes and light commercial spaces. The 2-inch depth makes it compatible with filter housings and air handlers designed for standard 2-inch media. It is appropriate for applications where an upgrade in dust-holding capacity over 1-inch filters is desired without requiring modification to the existing filter cabinet or rack.

Key Features

• Pleated media design increases surface area for improved particulate capture and extended filter life
• 2-inch depth fits standard filter tracks designed for 2-inch pleated media
• Nominal size of 12 x 25 x 2 inches suits a wide range of common filter openings
• Protects HVAC coils and blower assemblies from airborne dust and debris
• Designed for extended service intervals compared to standard 1-inch flat-panel filters

Compatibility

Designed as an OEM-style replacement for residential and light commercial forced-air HVAC systems requiring a 12 x 25 x 2 inch pleated air filter.

Installation Notes

This filter is typically installed by HVAC technicians or qualified maintenance personnel during routine system service. Power down the air handler or furnace before replacing the filter. Install the filter with the airflow direction arrow on the frame pointing toward the blower. Follow the equipment manufacturer's recommended replacement schedule or inspect monthly and replace when visibly loaded.

Technical Specifications

• Nominal Length: 25 inches
• Nominal Width: 12 inches
• Nominal Depth: 2 inches
• Filter Media Type: Pleated

Standard Information

• Brand: KOCH FILTER
• Manufacturer Part Number: P421225