Honeywell Prestige Equipment Interface Module, 2-Wire for use with: All THX9421R5021 Prestige 2-Wire IAQ Thermostats and all Versions of Prestige IAQ Thermostats and the VisionPRO Thermostats with RedLINK Technology, 18 to 30 VAC 50/60 Hz, Screw Terminal, Gray, 9-5/16 inch height x 4-13/16 inch Width x 1-5/8 inch D
Equipment Interface Module controls up to 4-stages of heat and 2-stages of cool inch a heat pump system and up to 3-stages of heat and 2-stages of cool inch a conventional system. Three sets of Universal IAQ contacts to control humidification, dehumidification and ventilation. Four sensor inputs for wired sensors or dry contact devices.