13x21_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Monitors & Timers Can I dim the BlackBird

Can I dim the BlackBird for seedlings and early veg

Precise digital display shows current temps 24/7

it disrupts the digestive system

re-calibrate your meters periodically with a 20 ml pack of 1000ppm calibration solution

first cause of unhealthy environment

13x21_3/4x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Monitors & Timers Can I dim the BlackBirdNordic 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