8_7/8x19_1/8x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack featured This is a wired control

This is a wired control that connects directly to your dehumidifier for accurate

for maximum energy efficiency

you are still able to use it with the standard hand crank if no electricity is available without and modifications or serious changes to the trimmer

Directs all nutrients to your plant

and eliminates the need for external ballasts or reflectors

8_7/8x19_1/8x1 MERV 13 Plus Carbon AC Furnace Filters 6 Pack featured This is a wired controlNordic Pure Custom MERV 13 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