9x13x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts 10” Wide

10” Wide

and higher yields

• Used for existing plants

Derived from the best quality high-nitrogen bat guano available

9x13x1 MERV 14 Plus Carbon AC Furnace Filters 6 Pack Grow Light Ballasts 10” WideNordic 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