iO-TWIN Universal Twinning Kit
The Twinning Kit is designed to allow a single thermostat to control two identical HVAC units. It can also be expanded to control a total of four HVAC units. The iO-TWIN can be used on common or separate ducted systems with single-stage, multi-stage or heat pump equipment. Only standard 18-gauge thermostat wire is required. Thermostats and HVAC units can be located up to 300’ from the twinning kit panel.