11_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Fertilizer All fittings included

All fittings included

Perfect solution for shipping applications

Developed and tested in controlled agricultural environments

UL Certified

Can I dim the BlackBird for seedlings and early veg

11_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Fertilizer All fittings includedNordic Pure Custom MERV 14 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