21x23_1/2x1 MERV 14 AC Furnace Filters 6 Pack spl_hw use as soon as insect

use as soon as insect pests are spotted

Outputs controlling humidification and dehumidification

reducing your cultivation footprint by up to 50%

Sunrise/sunset simulation settings to provide a gradual ramp-up and down at both ends of your photoperiod

21x23_1/2x1 MERV 14 AC Furnace Filters 6 Pack spl_hw use as soon as insectNordic Pure MERV 14 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 14 furnace filters are comparable to HVAC filters with the rating of MPR 2800.