9x13x1 MERV 13 AC Furnace Filters 6 Pack Bio-Fertilizer YPFD Avg: 240 μmol/sec/m2

YPFD Avg: 240 μmol/sec/m2

Weight - ~13

"I switched from a 2-part nutrient line and the difference in fruit set was noticeable within the first cycle

AWOL bags are made with the highest quality fabrics

Growers report tighter inter-nodal spacing and better yields on flowering plants

9x13x1 MERV 13 AC Furnace Filters 6 Pack Bio-Fertilizer YPFD Avg: 240 μmol/sec/m2Nordic 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