Blueprint BAC-1 Digital Atmosphere ControllerETL listed for commercial and hobby applications, the Blueprint Controllers Digital Atmosphere Controller BAC 1 offers precision control of 120 volt cooling, heating, and humidity devices, plus a recycling device such as a CO2 regulator or generator. The recycle timer accommodates cycles from zero seconds to 96 hours, and a 15 foot remote temperature sensor with built in photocell facilitates separate day and night settings. The BAC 1 stores maximum