Stratus vortex cooler kits contain everything needed to implement enclosure cooling. The kits include a Stratus vortex cooler with distribution tube and muffler, a Stego adjustable thermostat, a Nitra pneumatic filter/regulator with Nitra 5-micron filter element and a Nitra two-way, two-position solenoid valve. Cooling capacities range from 500 to 2,500 Btu/hour. The coolers offer refrigerant-free cooling (no CFCs or HCFCs), have no moving parts and are suitable for harsh environments. The all stainless steel cooler mounts in a single ¾-inch electrical conduit knockout. Built-in relief valves and seals enable the unit to maintain the sealed nature of NEMA 4, NEMA 4X and NEMA 12 enclosures.