12_1/8x15x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack Meters & Solutions 3 microns—similar to the protection

3 microns—similar to the protection of an N95 respirator

The grow room controller turns groups of lights on and off to simulate sunrise and sunset for your plants as well as applying several other functions like overheat protection

durable and portable

internal battery and features LED status indicator for low battery power

This is gentle on plants and the yo-yo string is 60" in length

12_1/8x15x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack Meters & Solutions 3 microns—similar to the protectionNordic Pure Custom MERV 10 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