21_1/2x23_5/16x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack misc and lanyard

and lanyard

Features an LCD display with remote smart temperature and humidity sensors

PPF : 2600 μmol/S

Ferocious is a nutrient enhancer and should NOT be used as a replacement for nutrients

21_1/2x23_5/16x1 MERV 7 Plus Carbon AC Furnace Filters 6 Pack misc and lanyardNordic 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