16_1/4x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Controllers POWDERY MILDEW

POWDERY MILDEW

This will keep the mycorrhizal fungi in suspension for equal distribution when applying as a root drench

Recommended Max CFM: 1500 CFM

humic acids increase production of plant enzymes

Greenhouse whitefly (Trialeurodes vaporariorum)

16_1/4x21_1/2x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Controllers POWDERY MILDEWNordic 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