Filter King AF17x21x1A-M13 Merv 13 Air Filter 17x21x1

Product Description

The FILTER KING AF17x21x1A-M13 is a MERV 13 pleated HVAC air filter designed for residential and light commercial forced-air systems. With a nominal size of 17x21x1 inches and an actual size of 17 x 21 x 0.75 inches, this filter fits standard 1-inch filter slots. MERV 13 filtration captures fine particulates including dust, pollen, mold spores, pet dander, and fine smoke particles. This rating meets the threshold commonly specified for improved indoor air quality in residential HVAC applications. HVAC technicians and facility maintenance personnel install this filter as a routine service item during preventive maintenance visits.

This filter is suited for residential and light commercial forced-air systems using standard 1-inch filter housings, return air grilles, or air handler filter racks. The 17x21x1 nominal size is a common fit across a wide range of residential air handlers and furnace filter slots. Sold in a quantity of 10 per order, making it practical for technicians servicing multiple units or managing filter change schedules at a single location.

Key Features

• MERV 13 rating captures fine particulates including smoke, fine dust, and allergens
• Pleated media design increases surface area for improved airflow and particle capture
• Nominal size 17x21x1 inches fits standard 1-inch residential filter openings
• Actual size 17 x 21 x 0.75 inches for precise fitment reference
• Sold in a 10-pack for efficient stocking and multi-unit service calls

Compatibility

Designed as an OEM-style replacement for standard 1-inch residential and light commercial HVAC air filter applications using a 17x21x1 nominal filter slot.

Installation Notes

Installation is performed by HVAC technicians or qualified maintenance personnel. Always power down the air handler or furnace at the disconnect or thermostat before replacing the filter. Confirm airflow direction marked on the filter frame matches the system airflow before securing the filter in the housing. MERV 13 filters can restrict airflow in systems not designed for high-efficiency media — verify the system fan can maintain adequate external static pressure at this filtration level before specifying on a new install.