Replace your thermostats with this easy-to-use, affordable    temperature controller!!! 
    
 
The GHK12X2C is a version of the wildly popular GHK12X2 that    includes curtain/vent control. It has all of the GHK12X2’s features -    programmable temperature setting in DIF, DAY & NITE stages; 2    HEAT, 4 COOL steps with automatic and manual settings; TIMER and    ALARM outputs; 1 or 2 zones; VENT stage for dehumidification;    STATISTICS (min, max, and 7 days of temperature averages) - plus 5    steps of CURTAIN/VENT control to open/close a curtain/roof vent to    desired percent open as the temperature varies. The GHK12X2C is    compatible with CIS software to connect multiple controllers to a personal    computer for programming and monitoring.   
 
Features of the GHK12X2 Greenhouse Controller:
Programmable for 1 or 2 zones 
DIF, DAY, and NIGHT settings for each zone 
4 COOL, and 2 HAF relay outputs source 24V AC 
2 HEAT outputs are open/closed contacts or source 24V AC 
Automatic or manual settings for each HEAT or COOL output 
1 TIMER output for irrigation or lights 
ALARM output (High Temperature, Low Temperature, Power Loss) 
Vent Stage for dehumidification 
Programmable delay for HEAT-COOL (COOL-HEAT) transitions 
Statistics - min and max temperature, 7 days of averages for DIF, DAY, NITE and 24hr. 
Override of temperature setting for temporary adjustment 
24 hour clock and memory with battery back-up 
Curtain/Vent Control available on models GHK12X2C and CH 
Set Point Heat available on models GHK12X2H and CH 
Remote control and programming with CIS