18x22x1 MERV 13 AC Furnace Filters 12 Pack harvest-solutions At an application rate of

At an application rate of 5 ml per gallon

This outer body build comes together with aluminum duct flanges to create a sturdy build capable of withstanding inclement weather

Emergency shut-off valve provides fail-safe overflow protection

Use in conjunction with a fertilizer program

is not conducive to the spread of plant diseases

18x22x1 MERV 13 AC Furnace Filters 12 Pack harvest-solutions At an application rate ofNordic 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