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Cooling and Humidity Controller (CT-DH-4 & 4P)

Indoor Garden Supply | Climate Controllers

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Our Price: $247.50

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Independent outlets. The Green Air CT-DH-4 is designed to be used with CO2 equipment, dehumidifiers, and exhaust fans. While it is similar to the CT-DH-3 it has the added feature of offering independent outlets for temperature and humidity control. This cooling and humidity controller is ideally suited for use with dehumidifiers. Temperature raise will activate the right hand outlets and deactivate the CO2 outlet. Humidity rise will activate the dehumidifying outlet. Internal sensors will allow a 7° temperature comfort zone and a 7% humidity (differential) between the time the equipment goes “Off “and comes back “On” again. Plug the controller into 110V wall outlet. Set the temperature and humidity to the desired settings. The CO2 outlet is normally in the “On” position and is able to activate CO2 equipment as needed. The photosensor will defeat CO2 enrichment during darkness hours.

The Green Air CT-DH-4P cooling and humidity controller is the same as the CT-DH-4 except that it is available with a built in photo sensor to defeat CO2 enrichment during darkness hours.


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