Nordic Pure 18x20x1M8-4 Pleated Merv 8 Air Filter 4 Pack

Product Description

The NORDIC PURE 18x20x1M8-4 is a pleated MERV 8 air filter sold in a 4-pack, designed for residential and light-commercial HVAC systems including gas furnaces, air handlers, and central air conditioning units. Each filter measures 17.5 x 19.5 x 0.75 inches actual size with a nominal size of 18x20x1 inches. The electrostatically charged filter media captures lint, dust, pollen, bacteria, pet dander, dust mites, mold spores, and other airborne contaminants on every air pass. The heavy-duty frame is constructed from moisture-resistant beverage board. These filters are made in the USA and meet ASHRAE MERV 8 efficiency standards, equivalent to an MPR 800 rating.

This filter is suited for residential homes, apartments, and small commercial spaces where a balance of airflow and particle capture is needed. It fits standard 18x20x1 filter slots in forced-air furnaces and AC air handlers. HVAC technicians and service professionals commonly stock this size for routine maintenance calls. Replacement interval is typically every 1 to 3 months, though households with pets or allergy-sensitive occupants may require more frequent changes. Always verify the actual opening dimensions against the filter actual size before installation.

Key Features

• MERV 8 efficiency rating per ASHRAE standards, equivalent to MPR 800
• Electrostatically charged, hypoallergenic, and antimicrobial pleated media
• Captures lint, dust, pollen, pet dander, dust mites, mold spores, and bacteria
• Moisture-resistant heavy-duty beverage board frame resists sagging in humid airstreams
• Media will not promote bacterial or mold growth on the filter surface
• Made in the USA - 4 filters per box

Compatibility

Designed as a direct-fit replacement for standard 18x20x1 nominal filter slots in residential and light-commercial forced-air furnaces, air handlers, and central AC systems. Actual filter dimensions are 17.5 x 19.5 x 0.75 inches - measure the filter slot opening before ordering to confirm fit.

Installation Notes

Filter replacement is a routine maintenance task performed by HVAC technicians and knowledgeable building owners. Before replacing the filter, set the thermostat to the off position or shut down the air handler to prevent unfiltered air from bypassing the slot during changeout. Note the airflow direction arrow printed on the filter frame and orient the filter so the arrow points toward the blower. Dispose of the used filter in a sealed bag to contain captured particulates.