16_1/4x21_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack hydro-x Curative – 10-25 per 100

Curative – 10-25 per 100 square feet

Although the atmosphere is comprised of around 80% nitrogen

66mm bed thickness

plastic observation windows

Suggested Uses: Use to aid in the application of foliar fertilizers

16_1/4x21_1/2x1 Exact MERV 7 Plus Carbon AC Furnace Filters 6 Pack hydro-x Curative – 10-25 per 100Nordic Pure Custom MERV 7 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