13x21_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Emitters Lettuce Drop (Sclerotinia sp)

Lettuce Drop (Sclerotinia sp)

Gross Weight: 75

The “Best Choice” for a liquid pH adjuster

Micronutrients: Iron (Fe)

Big Rootz Bloom is pH-adjusted and enriched with mycorrhizae to maximize root growth

13x21_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Emitters Lettuce Drop (Sclerotinia sp)Nordic 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