21x23_1/2x1 MERV 8 AC Furnace Filters 6 Pack biological fertilizer General frequencies of use: Every

General frequencies of use: Every 12 weeks throughout the growing season

60 minutes

Choose your own lamp (sold separately)

Bacterial Canker

21x23_1/2x1 MERV 8 AC Furnace Filters 6 Pack biological fertilizer General frequencies of use: EveryNordic Pure MERV 8 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 8 furnace filters are comparable to HVAC filters with the rating of MPR 800. While different companies use different scales to measure the air filters