17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Pots and Containers The strategic addition of just

The strategic addition of just the right amounts of calcium and magnesium actually displaces sodium and excess potassium

The HI98115 is supplied complete with a carrying case and calibration solutions

Twister T6 Chute

Can be tank mixed after testing for compatibility and plant sensitivity

ETL Sanitary

17_1/2x21x1 Exact MERV 10 Plus Carbon AC Furnace Filters 6 Pack Pots and Containers The strategic addition of justNordic Pure Custom MERV 10 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