16x18x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack timers-and-instruments such as chemicals from household

such as chemicals from household cleaning products

This results in up to 40% greater trichome preservation during the trimming process

002 pH pH Calibration Automatic

Each Nordic Pure 4” MERV 7 air filter captures airborne particles as small as 3

black lady bird beetles

16x18x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack timers-and-instruments such as chemicals from householdNordic Pure Custom MERV 13 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