Vortex A/C from Vortec provides Total Enclosure Protection against heat and contamination for NEMA 12 and 4/4X environments. The quiet compressed air powered enclosure coolers provide 900 to 5000 BTUH of cooling and simply installs in a 1 ½” knockout hole in the top or side of your enclosure. Enclosure temperature is maintained at 80 to 90°F with an integral mechanical thermostat so no electricity is required.