18x22x1 MERV 7 AC Furnace Filters 12 Pack Garden Hygiene and Safety Please contact your local agriculture

Please contact your local agriculture agent for specifics regarding your area if you are in CA

They also block UV light and infrared heat

Three-layer SMS is lightweight and breathable

Super-spreader included

This can be applied to any type of soil or plant without concern for waste

18x22x1 MERV 7 AC Furnace Filters 12 Pack Garden Hygiene and Safety Please contact your local agricultureNordic 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