This one-time test comes in packs of 20 and requires a color chart to determine results. Separate CO2 tubing with holes is available in 20ft. lengths. These safe CO2 generators burn natural gas or propane to generate CO2. Safety features include pilot light safety valve. GreenAir's exhaust controller is designed to turn exhaust fans on and off when the temperature or humidity becomes excessive.
Temperature rise activates right outlets and dismantles left outlets.
Humidity rise also activates right outlets but does not defeat left outlets. Operates on 110 VAC with 15 amp switching capacity. HF Deluxe Climate Controller Hydrofarm's Deluxe Climate Controller gives you the ability to activate cooling devices such as circulation fans, dehumidifiers and exhaust fans, as well as shut off your CO2 system to preserve your gas supply. The Controller also provides an additional outlet which is always on for interior circulation fans or ionizers. All contents copyright 1999 Plant'It Earth TM .