iO HVAC Controls iO-TWIN Universal Twinning and Paralleling Kit

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