17_1/8x26_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack complete-systems Hydrofarm's heavy duty measuring beaker

Hydrofarm's heavy duty measuring beaker offers easy-to-read

Big Boy extra high capacity dechlorinator and sediment filter with upgraded KDF85/Catalytic Carbon filter

Samsung LM301H 5000K (288PCS)

easy-to-use formula for the hobbyist and professional gardener

The active ingredient

17_1/8x26_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack complete-systems Hydrofarm's heavy duty measuring beakerNordic Pure Custom MERV 14 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