18x25x2 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack lighting-&-electrical-components This is critical when choosing

This is critical when choosing a quality carbon filter like a Phat Filter

Built-in Microchip

Quick and intuitive to use with simple one button presses to change between measurements

and multiple nutrient sources ranging from quick-release nutrients to nutrients with a longer release schedule to avoid nutrient burn

Flexible premium vinyl

18x25x2 Furnace Air Filters MERV 12 Pleated Plus Carbon 12 Pack lighting-&-electrical-components This is critical when choosingNordic Pure 18x25x2 MERV 12 Plus Carbon air filters are made of a dual material where the MERV rated material has been fused together with a carbon layer. This results in less flow restriction and 33% more surface area for cleaner smelling air. It will help eliminate unwanted odors as well as trap most airborne dust and particulate matter for fresh, clean air. Odorous gases and vapors (VOC) are attracted to and held by the activated carbon material