Mann Hummel 18x20x1f Fiberglass Air Filter Merv 4

Product Description

The MANN HUMMEL 18x20x1f is a fiberglass panel air filter designed for standard residential and light commercial HVAC forced-air systems. Rated MERV 4, it captures larger airborne particles such as dust, lint, and debris before they reach the air handler or furnace heat exchanger. At 18 inches wide, 20 inches tall, and 1 inch deep, this filter fits a wide range of standard filter slots without modification. MERV 4 filtration is appropriate where the primary goal is equipment protection rather than fine particulate removal. HVAC technicians and maintenance personnel install this filter as part of routine preventive maintenance schedules.

This filter is suited for residential gas furnaces, heat pumps, and central air conditioning systems using standard 1-inch filter tracks. It is also applicable in light commercial air handlers where a low-resistance, equipment-protecting filter media is specified. Fiberglass construction provides minimal static pressure drop, which helps maintain rated airflow through the system. It is a common choice for rental properties, warehouses, and equipment rooms where filter changes occur on frequent intervals.

Key Features

• MERV 4 rating captures larger dust particles, lint, and debris for basic equipment protection
• Fiberglass media delivers low static pressure drop and maintains system airflow
• Nominal dimensions of 18 x 20 x 1 inches fit standard residential and light commercial filter slots
• Lightweight construction simplifies handling during routine filter change-outs
• Manufactured under the CLARCOR Air Filter line distributed by MANN HUMMEL

Compatibility

Designed as an OEM-style replacement fiberglass panel filter for residential and light commercial forced-air HVAC systems accepting a nominal 18 x 20 x 1 inch filter size.

Installation Notes

A licensed HVAC technician or qualified maintenance personnel should shut off the air handler or furnace at the unit disconnect before replacing the filter. Confirm airflow direction arrows on the filter frame align with the direction of airflow toward the blower. Dispose of the used filter promptly to avoid redistributing captured debris. Filter replacement intervals vary by application but should follow the system manufacturer's maintenance schedule.

Technical Specifications

• Width: 18 inches
• Height: 20 inches
• Depth: 1 inch
• MERV Rating: 4
• Filter Media: Fiberglass
• UNSPSC Code: 40161505

Standard Information

• Brand: MANN HUMMEL
• Manufacturer Part Number: 18x20x1f