20x20x12 Fiberglass Air Filter CartridgeMERV 14, Koch 112-602-005 voomi_id_66343 This normally open (N/O) switch

This normally open (N/O) switch ensures current flows only when the pressure is above the setpoint

The 12K Ohm Outdoor Air Sensor from Weil McLain

providing a stable voltage conversion for various systems

The Dripless Si300 Contractor Grade Heavy Duty Caulking Gun has an easy-to-use design for mid- to high-viscosity materials

20x20x12 Fiberglass Air Filter CartridgeMERV 14, Koch 112-602-005 voomi_id_66343 This normally open (N/O) switchMedium and High Efficiency The Koch Multi Flo is a rigid, extended surface air filter engineered to provide medium and high efficiency air filtration, and long filter lifecycles. The Multi Flo, because of its rugged metal and plastic frame construction, is capable of operating in a wide variety of air handling systems, and is an excellent product for variable air volume (VAV) applications where changes in airflow might render a nonrigid filter