Mann Hummel 20x25x1f Fiberglass Air Filter Merv 4

Product Description

The MANN HUMMEL 20x25x1f is a fiberglass panel air filter rated MERV 4, designed for use in forced-air residential and light commercial HVAC systems. Measuring 20 inches wide by 25 inches tall by 1 inch deep, it fits standard filter slots without modification. At MERV 4, it captures large airborne particles including dust, pollen, and textile fibers, providing basic air-side protection for blower components and heat exchangers. It is installed by HVAC technicians and knowledgeable maintenance personnel during routine filter-change service.

This filter is suited for residential furnaces, air handlers, and heat pump systems where basic filtration is specified. The 1-inch depth makes it a direct drop-in for the most common residential filter slot dimensions found in return-air grilles, side-return cabinets, and dedicated filter-rack assemblies. The 20 by 25 by 1 inch nominal size is among the most widely used in single-family and light commercial applications.

Key Features

• MERV 4 filtration rating captures large particles including lint, dust, and pollen
• Nominal dimensions: 20 inches wide x 25 inches tall x 1 inch deep
• Fiberglass media construction provides low static pressure drop
• Flat panel design fits standard 1-inch filter racks and return-air grilles
• Suitable for routine replacement intervals in residential and light commercial systems

Compatibility

Designed as an OEM-style replacement panel filter for residential and light commercial forced-air HVAC systems requiring a nominal 20x25x1 inch fiberglass filter.

Installation Notes

Installation is performed by HVAC technicians or qualified maintenance personnel. Always set the system thermostat to the off position and confirm the blower has stopped before removing the existing filter. Insert the replacement filter with the airflow arrow on the frame pointing toward the blower or air handler. Follow local mechanical codes and the equipment manufacturer's recommended filter-change intervals.

Technical Specifications

• Width: 20 inches
• Height: 25 inches
• Depth: 1 inch
• MERV Rating: 4
• Media Type: Fiberglass
• UNSPSC Code: 40161505

Standard Information

• Brand: MANN HUMMEL
• Manufacturer Part Number: 20x25x1f