18x27x1 MERV 12 AC Furnace Filters

Marsoni

M251S

$81.01

Get it in 3 business days with 1 day shipping. Friday, May 29

18x27x1 MERV 12 AC Furnace FiltersActual Size: 17 1 2 x 26 1 2 x 3 4 (17. 5 x 26. 5 x 0. 75) Removes lint, household dust, pollen, smoke particles, dust mites, pet dander, virus carriers, mold spores and other contaminants. Ideal for high efficiency air filtration and will help those with moderate allergies and asthma. Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 12 is equivalent to MPR 1500 1900 Made in the USA. Nordic Pure

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Bought for gun safe. I made a custom install using one of the bolt down holes up front and a wood box from crate. Had to cut cord and use an approved Wago connector. Enough spacing for wall warts to power lights, dehumidifier and fanless computer. 65W total. It can only provide full 65watts if one USB-C ports is used.

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Reviewed in the United States on February 24, 2026