An easy-to-use alternate solution to HTC Climate Controller: just connect your fan, your dehumidifier or humidifier, your CO2 generator, set the knobs and you're ready! Two built-in LVC1 (low voltage relays) to control high power HVAC systems (A/C, dehumidifier...). Optional output boxes for heating (OB2) and fan speed control (OB2-V) sold separately. Also includes these smart features: empty CO2 tank detection, automatic competing equipment detection and high/low temp limits.