16_1/2x21_5/8x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack growing-accessories the unique molecular structure of

the unique molecular structure of phosphite is readily and easily absorbed by the roots and leaves of the plant

It comes with a 3-in-1 Temp/Humid/Photocell sensor

This ionization equipment is effective in reducing harmful pollutants and odors by introducing positive and negative ions into the system airflow

This enables active temperature monitoring as well as intelligent programming that will automatically adjust fan speeds to respond to varying temperatures for each zone

while a storm flap over the zipper adds an extra layer of protection

16_1/2x21_5/8x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack growing-accessories the unique molecular structure ofNordic Pure Custom MERV 10 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