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Feature
This is product is only to be installed by a qualified Heating & Cooling TechnicianAdds a common connection "C" to any popular Wi-Fi thermostat
Allows a 24-Volt power source to be added to an existing installation, without adding an additional wire
If your equipment does not have R-C terminals, a 24V transformer may need to be installed
Some systems may not be covered in the instructions provided. See http://fast-stat.net/pdf/FAST-STAT-Wiring-Solutions-Guidebook-52.pdf for all installations