21x21x1 Exact MERV 8 AC Furnace Filters 6 Pack PPE Flowering plants require higher amounts

Flowering plants require higher amounts of phosphorous (P) and potassium (K) to increase flower bulk and support high-metabolic activities

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Suitable for the entire floral distribution chain

Its unique air ventilation and circulation design does not require air pumping to generate additional oxygen in and hot air out of the growing chamber

21x21x1 Exact MERV 8 AC Furnace Filters 6 Pack PPE Flowering plants require higher amountsNordic Pure MERV 8 Pleated AC Furnace Air Filters provide exceptional filtration for both home and commercial environments. Each time air passes through a Nordic Pure pleated furnace air filter, lint, dust, pollen, bacteria, pet dander, dust mites, mold spores and other contaminants are removed. MERV 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters