16x21_1/2x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack bloom nutrients This system focuses 20% more

This system focuses 20% more of the light to the target area than our nearest competitor to enhance the performance of the lamp and maximize plant quality and yield

Recommended for INDOOR use

and top performance

Contains three dual-ball bearing blowers with PWM-controlled motors to minimize noise

16x21_1/2x1 Exact MERV 8 Plus Carbon AC Furnace Filters 6 Pack bloom nutrients This system focuses 20% moreNordic Pure Custom MERV 8 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