ETL-listed for commercial and residential applications, the Blueprint Controllers® Digital CO2 Controller BCC-2 delivers precise control of up to two 120-volt CO2-generating devices. Integrated fuzzy logic technology maximizes CO2 efficiency by fine-tuning ppm levels on-the-fly when using compressed CO2. To minimize CO2 loss, connect the included adapter to a cooling device for coordinated CO2 and ventilation. A 15-foot remote temperature sensor accurately monitors CO2 level and features a photocell for day-only operation. Adjustable ppm setting ranges from 400 to 2,000 with an adjustable deadband. Three-year warranty; maximum load of 14.5 amps.