The Sky-Com Series fromSkymark International Inc.(Ajax, ON, Canada) is designed for computer rooms, telecommunications rooms, laboratories, or any application where a controlled environment is critical. The unit is available in air, water, or glycol-cooled systems; in upflow or downflow configurations with free air return; and is manufactured in vertical 6-, 8-, 10-ton models and horizontal 1- to 3-ton models. The control system allows selection and programming of temperature and humidity setpoints, alarm parameters, and operating configuration.