12_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions and are a USDA Certified

and are a USDA Certified Bio-Based Product

Greenhouses and Harvesting

contaminant-free trimming environment

It’ll blend naturally in any outdoor environment

6 µmol/j—half the power of our best-performing fixture—you get less ambient heat that has the potential to damage your crops at close proximity

12_1/2x23_1/2x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack PH/EC/TDS Meters and Solutions and are a USDA CertifiedNordic 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