16_3/8x21_3/8x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack complete-systems salt build-up

salt build-up

Cloud Coir offers the perfect ratio for roots to thrive and not become over saturated

Turn an average yield up to 2

Shallow grooves for easy cleaning

Gluten-8 is water-soluble and provides pre-emergent control of annual grasses and broad leaf weeds without the effort of applying the granular corn gluten (Sustane Spring Weed & Feed)

16_3/8x21_3/8x1 Exact MERV 12 Plus Carbon AC Furnace Filters 6 Pack complete-systems salt build-upNordic Pure Custom MERV 12 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