23_1/2x23_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack botanicare promotes short inter-nodal spacing

promotes short inter-nodal spacing

Nordic Pure 20x30x1 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer

HLG BLACKBIRD is designed for home grows and is perfect for 4x4 grow tents

The Grow1 Deep Water Culture Kit is the answer

Expanded size: 12" x 12" x 14"

23_1/2x23_1/2x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack botanicare promotes short inter-nodal spacingNordic 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