20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_hw as well as for homeowners

as well as for homeowners and hobby growers

VPD (Vapor pressure Deficit)

• Emits 300 Luminous Flux Units (Equivalent to 3 CFL bulbs)

Shake well before each use

20x21_1/2x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack spl_hw as well as for homeownersNordic 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