20x21_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack lighting-accessories Active Air dehumidifiers are designed

Active Air dehumidifiers are designed to provide optimal humidity control in your growing environment

Measured in micromole/sec

Long-lasting - remains effective for up to 6 weeks

with a form factor that may even resemble a Juul from a distance

20x21_1/2x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack lighting-accessories Active Air dehumidifiers are designedNordic Pure Custom MERV 12 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