Nordic Pure 17_1/2x21x1ExactCustomM7+C-6 Furnace Filter

Product Description

The NORDIC PURE 17_1/2x21x1ExactCustomM7+C-6 is a custom-cut, MERV 7 pleated carbon air filter designed for residential and light-commercial AC and furnace systems. Each filter is hand-fabricated to exact dimensions of 17.5 x 21 x 0.75 inches, ensuring a precise fit where standard sizes fall short. The activated carbon layer targets common odors while the MERV 7 media captures airborne particles between 3 and 10 microns, including dust, lint, pollen, pet dander, and mold spores at a 50 to 70 percent capture rate. A reinforced two-part frame supports consistent airflow and structural stability over the service life. HVAC technicians and knowledgeable DIYers install these filters in air handlers and forced-air furnaces requiring non-standard filter dimensions.

This filter is suited for residential and light-commercial forced-air systems where the filter opening does not match a standard nominal size. Because it is custom-fabricated, the actual dimensions match the size ordered rather than following the nominal undersizing convention used for stock filters. Before ordering, the installer should measure the existing filter opening with a tape measure and confirm the actual length and width are within 0.125 inches of the listed size. This six-pack format reduces service call frequency and keeps a supply on hand for routine filter changes every 30 to 90 days, consistent with standard 1-inch filter replacement intervals.

Key Features

• MERV 7 filtration captures 50 to 70 percent of particles from 3 to 10 microns, including dust, pollen, pet dander, lint, mold spores, and odors
• Activated carbon layer reduces common household and system odors without added chemicals
• Custom-fabricated to exact dimensions of 17.5 x 21 x 0.75 inches for non-standard filter openings
• Reinforced two-part frame provides added structural rigidity and supports balanced airflow
• Sold as a six-pack to cover multiple scheduled replacement intervals
• Made in the USA

Compatibility

Designed for AC and furnace air handler applications requiring a custom filter size with an actual dimension of 17.5 x 21 x 0.75 inches. Not a direct drop-in for standard nominally sized filter slots. Measure the existing filter opening before ordering, as this custom size is not eligible for return.

Installation Notes

Filter installation and replacement is typically performed by licensed HVAC technicians or qualified maintenance personnel, though knowledgeable homeowners frequently handle 1-inch filter swaps. Always shut down the air handler or furnace at the disconnect or thermostat before removing the existing filter. Confirm airflow direction arrows on the new filter frame align with the direction of airflow into the blower section before seating the filter. Because this is a custom-fabricated product, inspect the filter frame for any handling damage before installation and do not force a filter into an undersized opening.