20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety Flush system after use

Flush system after use

Grow 530 is a lightly charged soil blend that includes worm castings and a small amount of dry fertilizer to support plant growth for 1-2 weeks prior to additional feeding and fertilization

• Total Nitrogen (N) 0

Safety features built-in along with blending capabilities to achieve up to 5

20x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack Garden Hygiene and Safety Flush system after useNordic Pure Custom MERV 7 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