The microclimate controllers are designed to perform all the major atmospheric and timed functions required in an automated growth environment including temperature, humidity, carbon dioxide enrichment, lighting and irrigation control. The controller incorporates an external coil cooling thermostat, a dehumidifying humidistat, a 24-hour clock timer, a photo-sensor and a repeat cycle timer. Triggers for remote high-amperage relays, which enable synchronized equipment management, provide heating and humidifying control. Automatic override and defeat systems coordinate controls to consider all possible variables. It is enclosed in a black anodized, brush finish aluminum housing that won't break, rust or corrode. An attractive screen-printed front panel with function indicator lights makes system monitoring and adjustment quick and easy. All connections are standard 3-prong grounded plugs and receptacles. No hard wiring is required for basic operations. Low and high voltage relays are available to operate auxiliary equipment.