17x25x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack coco-cubes factory tested

factory tested

This is one of the heaviest blends offered by Four Seasons and requires feeding throughout the entire growing season for best results

Average PPFD: 185 μmol/sec/m2

Applications include hydroponics

Features: Low frequency

17x25x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack coco-cubes factory testedNordic Pure Custom MERV 7 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