18x24x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack environmental-controllers High phosphorus and potassium content

High phosphorus and potassium content maximizes flower size

7mil thick mylar with black PE film backing for added strength

Chase Liquid Mole & Gopher Repellent is a biodegradable

In many cases

MERV 12 furnace air conditioning filters are comparable to HVAC filters with the rating of MPR 1500-1900

18x24x 1/2 Half Inch Ring Panel MERV 7 Furnace Air Filters 6 Pack environmental-controllers High phosphorus and potassium contentNordic Pure Half Inch Ring Panel AC Furnace Air Filters consist of an internal frame bonded between flat layers of two different types of electrostatically charged HVAC furnace filter media. The first layer is a high capacity, polyester filter material which acts as a pre filter, capturing large airborne particles. The second, more efficient, layer is a MERV rated smooth poly blend filter material. The electrostatic charge works as a magnet to draw in