21_1/4x23_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety resulting in outstanding results when

resulting in outstanding results when used in 2

this results in a better-quality end-product as the natural properties are preserved during the harvesting process

Perfect for a 3' x 3' growing area at 24”

What that means is water can absorb and remove from your garden 4 times the heat nearly 20 times faster than air

so it won’t easily come loose from fittings or drains

21_1/4x23_1/4x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety resulting in outstanding results whenNordic Pure Custom MERV 12 Plus Carbon air filters are made based on the actual measurements so be sure to measure your current filter to get the EXACT dimensions before ordering. As with all Nordic Pure filters, the effective life of your filter depends on the environment in which you live. We recommend changing 1 and 2 filters every 30 90 days. Our 4, 5 and 6 inch thick filters could last up to 6 months. EXACT MEASUREMENT: Furnace and air condition