20x28x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack coco Safety Certified

Safety Certified

GeoPot is also available in tan color

Removable driver and 2m extension cord helps lower the growing room temperature

Biostimulant effect from seaweed promotes vigorous growth

20x28x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack coco Safety CertifiedNordic Pure Custom MERV 14 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