12x12x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack Neem oil then choose your preferred relative

then choose your preferred relative humidity (RH) setpoint with the rotary knob

Both pH-balancing aids are manufactured using the highest-quality ingredients: potassium hydroxide to raise pH and nitric acid to lower pH

one for each zone

Advanced channel design eliminates blockage and standing water to ensure proper and prompt drainage

Six brackets and hardware

12x12x 1/2 Half Inch Ring Panel MERV 12 Furnace Air Filters 12 Pack Neem oil then choose your preferred relativeNordic 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