Filter King AF18x18x1-M13 Merv 13 Air Filter 18x18x1

Product Description

The FILTER KING AF18x18x1-M13 is a MERV 13 pleated air filter designed for residential and light commercial HVAC systems. With a nominal size of 18 inches x 18 inches x 1 inch and an actual size of 17.5 inches x 17.5 inches x 0.75 inches, it fits standard 18x18x1 filter slots. At MERV 13, this filter captures fine particulates including dust, pollen, mold spores, pet dander, and fine smoke particles. It is sold in a quantity of 10 filters per order, making it a practical restocking option for service contractors and facility maintenance staff managing scheduled filter change programs.

This filter is suited for forced-air heating and cooling systems where MERV 13 filtration is specified. Applications include residential split systems, packaged units, air handlers, and fan coil units using 18x18x1 nominal filter racks or media cabinets. MERV 13 is commonly required in settings with heightened indoor air quality standards, including multi-family housing, schools, and commercial office spaces. Service professionals installing these as part of a recurring maintenance plan will find the 10-pack quantity convenient for stocking a service vehicle or storage room.

Key Features

• MERV 13 filtration rating captures fine particulates down to 1-3 microns
• Nominal 18 inches x 18 inches x 1 inch fits standard 18x18x1 filter openings
• Actual dimensions of 17.5 inches x 17.5 inches x 0.75 inches allow proper fit without binding
• Pleated media design maximizes surface area for lower static pressure drop relative to efficiency level
• Sold in a 10-pack quantity for contractor restocking and bulk replacement programs

Compatibility

Designed as an OEM-style replacement for residential and light commercial forced-air HVAC systems using 18x18x1 nominal air filter slots.

Installation Notes

Filter installation is typically performed by HVAC technicians or trained maintenance personnel. Always power down the air handling unit or furnace at the disconnect or thermostat before replacing the filter. Confirm the airflow direction arrow on the filter frame aligns with the direction of airflow toward the blower. Check the filter rack or media cabinet for debris before inserting the new filter, and verify the access panel seals properly after installation to prevent bypass air.