25x32x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage a 20x30x1 air filter is

a 20x30x1 air filter is actually 19 ½ x 29 ½ x ¾

[Lead Time of 4 to 6 weeks]

It’s a Plain Jane™ mix that contains a proprietary blend of low salt fiber and pith for superior aeration and optimal water retention

flat surface pH probes typically used in chemical plants for process control

Resin sealed circuit board for high humidity installations

25x32x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack food-&-water-storage a 20x30x1 air filter isNordic Pure Custom MERV 10 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition