16x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack ventilation and ducting Hang the BlackBird at 20–24

Hang the BlackBird at 20–24 inches above the canopy for flowering

It is compatible with most other insecticides

The small batch production of this machine is best suited for personal runs or test batches of a new material source

This ballast's constant wattage output means no lamp flickering and with the flip of a switch it can be converted from MH to HPS ballasts

fruit and vegetables

16x28x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack ventilation and ducting Hang the BlackBird at 20–24Nordic 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