8x14x1 Exact MERV 7 AC Furnace Filters 12 Pack spl_hi apply OMRI listed RootShield WP

apply OMRI listed RootShield WP (Wettable Powder) to protect plant roots from common soil-borne pathogens

Providing an average of 1000 umol/s of usable photon flux

Puffer applicator not included

Automatic Calibration- Automatic calibration to one or two points using standard buffers (pH 4

8x14x1 Exact MERV 7 AC Furnace Filters 12 Pack spl_hi apply OMRI listed RootShield WPNordic Pure MERV 7 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 7 furnace filters are comparable to HVAC filters with the rating of MPR 600. While different companies use different scales to measure the air filters