iO Universal Twinning/Paralleling Kit
iO Universal Twinning/Paralleling Kit
Item # iO-TWIN
Alternate Item # TK-400

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.

Features and Benefits
  • Easy to install and setup
  • Uses standard 18 gauge thermostat wire
  • Optional control of up to 4 units
  • Reduces installation time
  • 5-year warranty
Product Specifications
6.00” x 8.00” X 1.50” (WHD)
Input Voltage
Aluminum back plate with mounting holes


Universal Twinning Kit

Universal Twinning Kit


5418 Elmwood Ave | Indianapolis IN 46203 | 888-652-9663