8x12x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack bio-organic fertilizer including plant extracts (kelp and

including plant extracts (kelp and yucca) and humic acid

Just swap the tumbler out and keep running

Do not combine dry ice with water

Allows excess heat to escape

8x12x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack bio-organic fertilizer including plant extracts (kelp andNordic Pure Custom MERV 13 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