the efficiency of all air filters is rated according to the same criteria as set forth by ASHRAE
Nordic Pure 16x25x5 Air Bear Replacement MERV 8 air filters measure an actual depth of 4 7/8"
Nordic Pure 8x20x1 MERV 10 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer
Nordic Pure 16x20x5 Honeywell Replacement MERV 13 rated air filters are what is considered the traditional 5” filter at an actual 4 3/8”
The frame has 2 strips of foam tape on 2 sides
19x21 1/2x1 Exact MERV 10 AC Furnace Filters Number Per Box:6 the efficiency of all airActual Size: 19 x 21 1 2 x 3 4 (19 x 21. 5 x 0. 75) Removes pollen, smoke particles, pet dander, bacteria, allergens, mold, virus carriers, and other contaminants. Ideal for normal air filtration and will help those with mild allergies. Hypoallergenic, antimicrobial, and electrostatic filter media. Moisture resistant frame. Nordic Pure MERV 10 is equivalent to MPR 1000 Made in the USA. Nordic Pure MERV 10 Pleated AC Furnace Air Filters provide