effortless control gain worry-free control over ventilation co2 and heating units with the atmosphere co2 day-night temperature controller photosensor activates co2 during day cycles then as temperature rises ventilation is activated and co2 is shut off controller features accurate and reliable external temperature probes night heat outlet co2 outlet day and night exhaust outlet photo cell indicator lights and standard 120v receptacles unit is rated for 15 amps at 120v and carries a three-year warranty atcdn603 atmosphere co2 day-night temperature controller 239.95 independent temperature and humidity ...