16_1/2x21x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Odor Control 39 x PotPro™ | Link

39 x PotPro™ | Link x 2ft (unit)

2-0-4 & BLOOM B

Best used at the first sign of an infestation

Field growers should apply Z7 at first planting and whenever possible thereafter

16_1/2x21x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Odor Control 39 x PotPro™ | LinkNordic 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