Filter King AF18x24x1-M11 Merv 11 Air Filter 18x24x1

Product Description

The FILTER KING AF18x24x1-M11 is a MERV 11 pleated air filter designed for residential and light commercial HVAC systems. With a nominal size of 18x24x1 inches and an actual size of 17.5 x 23.5 x 0.75 inches, this filter fits standard 1-inch filter slots found in forced-air furnaces, air handlers, and central air conditioning systems. At MERV 11, it captures a broad range of airborne particles including dust, pollen, mold spores, pet dander, and fine dust from household activity. HVAC technicians and service pros install these as part of routine preventive maintenance or seasonal filter changes.

This filter is suited for residential split systems, packaged units, and light commercial air handlers that accept a nominal 18x24x1 filter. It performs well in environments where air quality concerns are moderate to high, such as homes with pets, allergy-sensitive occupants, or moderate dust loads. The pleated media design increases surface area compared to fiberglass panel filters, supporting longer service intervals between changes while maintaining airflow efficiency.

Key Features

• MERV 11 filtration rating captures particles down to fine dust, pollen, mold spores, and pet dander
• Pleated media construction maximizes filter surface area for improved dust-holding capacity
• Nominal size 18x24x1 inches fits standard 1-inch residential and light commercial filter slots
• Actual size 17.5 x 23.5 x 0.75 inches for proper fit without forcing or gapping
• Sold in a quantity of 10 per order, supporting multi-unit restocking or service fleet use

Compatibility

Designed as an OEM-style replacement pleated air filter for residential and light commercial forced-air HVAC systems accepting a nominal 18x24x1 inch, 1-inch-thick filter slot.

Installation Notes

Filter installation and replacement is typically performed by HVAC technicians or qualified service professionals. Always power down the air handler or furnace at the disconnect or thermostat before opening the filter access panel. Confirm the airflow arrow on the filter frame is oriented toward the blower or return-side direction as marked on the unit. Inspect the filter cabinet for gaps or bypass leaks and address any seal issues before returning the system to service.