When I had my heating/cooling system replaced I decided on the best air filtration available. These filters meet all requirements. They retain even the smallest particles and are durable. My wife has asthma and these filters help her a lot.
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NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
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