28x34x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting - OMRI Listed

- OMRI Listed

Spend Less Time Cleaning & More Time Trimming

Growth Science® Base A contains nitrogen and key micronutrients like calcium and magnesium to support essential plant function and encourage vegetative growth

41 mS/cm or 5

8 x Quickfill™ Bag | 1 gal (case)

28x34x1 MERV 8 Plus Carbon AC Furnace Filters 6 Pack Cloning & Seed Starting - OMRI ListedNordic Pure Custom MERV 8 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