Koch Filter P421525 Pleated Air Filter 15x25x2

Product Description

The KOCH FILTER P421525 is a 2-inch-depth pleated air filter designed for residential and light commercial HVAC systems that require deeper filtration media than standard 1-inch filters. The increased media depth expands available surface area, which raises dust-holding capacity and extends service intervals between changeouts. The pleated construction supports consistent airflow resistance across the filter face, helping the air handler maintain designed static pressure. Licensed HVAC technicians and knowledgeable service technicians install this filter during routine maintenance or system tune-ups.

This filter fits forced-air heating and cooling systems with a 15 x 25 x 2 inch filter slot. The 2-inch depth makes it suited for applications where longer service life is preferred over frequent 1-inch filter replacements, including systems serving high-traffic residential spaces, small commercial offices, or any environment with moderate airborne particulate loads. Confirm the filter cabinet or rack is rated for 2-inch media before installation.

Key Features

• 2-inch media depth increases dust-holding capacity versus standard 1-inch filters
• Pleated construction maximizes filtration surface area within a compact frame
• Supports proper airflow and static pressure in forced-air HVAC systems
• Extended service intervals reduce frequency of scheduled filter changes
• Nominal size 15 x 25 x 2 inches fits compatible filter tracks and cabinets

Compatibility

Designed as an OEM-style replacement pleated air filter for forced-air HVAC systems with a 15 x 25 x 2 inch filter opening.

Installation Notes

Power down the air handler or furnace at the disconnect or thermostat before servicing the filter. Confirm the filter cabinet is designed to accept 2-inch media, as forcing an oversized filter into a 1-inch rack restricts airflow and can damage the blower. Slide the filter into the track with the airflow arrow on the frame pointing toward the blower. Follow local mechanical codes and the equipment manufacturer service instructions for recommended changeout intervals.

Technical Specifications

• Filter Depth: 2 inches
• Filter Width: 15 inches
• Filter Length: 25 inches
• Filter Type: Pleated

Standard Information

• Brand: KOCH FILTER
• Manufacturer Part Number: P421525