17x28x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack king shredder 60 watts /

60 watts /

and prevents your nutrients from falling out of solution

70P and 95P models

Meets National Organic Production (NOP) standards

Response curve is almost constant (versus Gaussian for digital meters) which yields a much higher accuracy independent of wavelength being measured- great for measuring LED light correctly

17x28x1 Exact MERV 14 Plus Carbon AC Furnace Filters 6 Pack king shredder 60 watts /Nordic 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