17_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack BVV an 8 oz package makes

an 8 oz package makes up to 800 gallons and a 2 lb package makes up to 3200 gallons

Produces vibrant

While the DEva can work with your existing lighting controller

9% of previously lost light while increasing lumen availability up to 300%

Highly recommend for any serious indoor operation

17_1/2x21x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack BVV an 8 oz package makesNordic 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