28x32x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Emitters - Built-in weed barrier

- Built-in weed barrier

making the growth chamber excellent for small scale isolation research

Increases resistance to environmental stress

We take the highest quality coir available

28x32x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack Emitters - Built-in weed barrierNordic 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