16x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Commercial Lighting - Safe for beneficial insects

- Safe for beneficial insects and bees

storage solution and pH 7

dual-release tablet design is what makes it truly unique: the first effervescent layer disperses an immediate dose within 60 seconds

Use TurboKlone to start your commercial grow

and there isn't a pest in sight

16x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack Commercial Lighting - Safe for beneficial insectsNordic 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