The Honeywell Silver/Gray Prestige RedLINK Thermostat Kit is the correct component used with the following:
The Honeywell Prestige RedLINK Thermostat Kit in Silver/Gray includes the Honeywell THM5421R1021 Equipment Interface Module, THM5421R1021 Equipment Interface Module, C7089R1013 Wireless Outdoor Sensor and 2 Duct Sensors. This RedLINK thermostat kit features a 7-Day programmable feature and has three assignable sets of universal IAQ contacts to control humidification, dehumidification and ventilation. It comes standard with a return and discharge air temperature sensor to measure Delta T.
Honeywell Prestige RedLINK Thermostat Kit Specifications:
The Honeywell Silver/Gray Prestige RedLINK Thermostat Kit keeps a searchable history of alerts and setting changes to the thermostat which helps to determine if there is a system malfunction or by user error. This 2-wire, high definition color touch screen thermostat kit is designed with RedLINK technology for residential or light commercial use. It has four assignable sensor inputs on the equipment interface module that can be used for wired sensors or dry contact devices.