Equipment Interface Module controls up to 4-stages of heat and 2-stages of cool in a heat pump system and up to 3-stages of heat and 2-stages of cool in 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.
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 in H x 4-13/16 in W x 1-5/8 in D, Import