3M Company 702-4 Electrostatic Air Filter 700 Mpr 20x20x1

Product Description

The 3M COMPANY 702-4 is an electrostatic air filter rated at 700 MPR, designed for residential forced-air HVAC systems. Measuring 20 inches by 20 inches by 1 inch, it fits standard 1-inch filter tracks in air handlers and furnaces. The electrostatic media carries a charge that attracts and captures airborne particles including dust, pollen, and lint. This package contains 4 filters. Licensed HVAC technicians and HVAC service professionals typically stock these for routine filter change-outs on residential equipment.

This filter is suited for residential forced-air heating and cooling systems that use a standard 1-inch filter slot. Common install locations include return-air grilles, air handler filter cabinets, and furnace blower compartments. The 700 MPR rating positions it as a mid-range filtration option, capturing finer particles than fiberglass panel filters while maintaining reasonable airflow resistance across typical residential equipment.

Key Features

• Electrostatic media charges particles for improved capture efficiency
• 700 MPR filtration rating for mid-range particulate capture
• Nominal size: 20 inches x 20 inches x 1 inch fits standard 1-inch filter tracks
• 4-pack quantity reduces service call frequency for routine replacements
• Compatible with standard residential return-air grille and air handler filter slots

Compatibility

Designed as an OEM-style replacement for residential forced-air HVAC systems that accept a standard 1-inch nominal filter measuring 20 inches x 20 inches x 1 inch.

Installation Notes

Installation is performed by licensed HVAC technicians or qualified service personnel. Before replacing the filter, set the thermostat to off and confirm the blower has stopped to prevent unfiltered air from bypassing the filter rack during changeover. Insert the filter with the airflow arrow on the frame pointing toward the blower. Follow NEC and local mechanical codes for any associated electrical work on the air handler.

Technical Specifications

• MPR Rating: 700
• Filter Dimensions: 20 inches x 20 inches x 1 inch
• Package Quantity: 4 filters
• Unit of Measure: EA
• Weight: 4.16 pounds

Standard Information

• Brand: 3M COMPANY
• Manufacturer Part Number: 702-4