16_3/8x21_3/8x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack additives pH is a measurement of

pH is a measurement of the acidity or alkalinity of your water or nutrient solution on a scale of 0-14

This instrument continuously monitors and displays the values of a solution on an easy to read set of LCDs

• Processes 16-20 lbs per hour

Privacy Fencing is a durable poly screen fabric with a reinforced hem and grommets for easy installation

Includes one 7-gallon controller bucket

16_3/8x21_3/8x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack additives pH is a measurement ofNordic 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