18x28x1 Exact MERV 13 AC Furnace Filters 6 Pack growing-accessories • Very strong photosynthetic action

• Very strong photosynthetic action

Great for commercial or residential use

Serged seams eliminate raw edges that can create and release additional particulate contamination

• Improves root development

Commonly used by floral professionals during the transport and storage stage of roses

18x28x1 Exact MERV 13 AC Furnace Filters 6 Pack growing-accessories • Very strong photosynthetic actionNordic Pure MERV 13 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, smoke particles, virus carriers, coughs and sneezes, smog, allergens and other contaminants are removed. MERV 13 furnace filters are comparable to HVAC filters with the rating of MPR 2200