6x20x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack lighting much better than traditional HPS

much better than traditional HPS grow systems

but your plants will also thrive

Rubber feet protect surfaces

Allows air and water to permeate to prevent fungus and diseases

6x20x1 MERV 12 Plus Carbon AC Furnace Filters 6 Pack lighting much better than traditional HPSNordic Pure Custom MERV 12 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