15_1/4x15_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Master Controller A storm flap over the

A storm flap over the zipper with pressure-sensitive tape helps prevent hazardous liquids from seeping through exposed zipper seams

Energy Efficient (Uses 40% less energy than HPS lamps)

Compacted material moves around less inside the bag when pressed reducing blowouts

mildew and bacteria feeding off the plant

For Hydroponics: Mix your normal nutrient solution and then add 5-15ml Ginormous per gallon of nutrient reservoir

15_1/4x15_1/4x1 Exact MERV 13 Plus Carbon AC Furnace Filters 6 Pack Master Controller A storm flap over theNordic 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