The CHHC-4 controls all of your growing area conditions accurately and reliably. First of all, it has all of the C02 control features of the CHHC-1 and CPPM-1. It also has the ability to control 3 other devices, a heating device and a humidity device. Records the min and max temperature, humidity and C02 levels.

Unlike some C02 controllers, the CHHC-4 is able to be calibrated by the user with the self calibration feature.

• NEW Green LED lights make this unit very plant friendly
• NEW Removable combination remote temp, humidity, light level & CO2 probe allows the CHHC-4 to be placed up to 16 feet away
• NEW Protective caps to help prevent water from getting into the controller
• Monitors and controls CO2 with PPM accuracy
• Also controls 3 other devices, a heating device, a cooling device and a humidity device
• Separate day/night temp and humidity settings
• Records the min and maxi temp, humidity and CO2 levels
• Has 2 separate outputs to control cooling and heating
• Can increase or decrease the amount of humidity in the growing area
• Remote temp, humidity, CO2 and light level sensor