18x18x 1/2 Half Inch Ring Panel MERV 8 Furnace Air Filters 6 Pack Lighting & Electrical Components is highly insensitive to pollution

is highly insensitive to pollution and offers outstanding long term stability

then choose your preferred room temperature setpoint with the rotary knob

Set of 2 stainless steel clamps included

- Measures room temperature in C°/F°

- Smart automatic self adjustment of operation differential to keep conditions closest to set points

18x18x 1/2 Half Inch Ring Panel MERV 8 Furnace Air Filters 6 Pack Lighting & Electrical Components is highly insensitive to pollutionNordic 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