13x23x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack spl_dakine420 Humidity: 5% to 90% RH

Humidity: 5% to 90% RH

consider the local quality of water when cultivating your growing area

Wireworms and Webworms

Dimensions: (with pre-filter)

Roots Organics CalMag is a pure and all natural blend of calcium

13x23x1 MERV 10 Plus Carbon AC Furnace Filters 6 Pack spl_dakine420 Humidity: 5% to 90% RHNordic 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