Honeywell Home THM5421R1021 Equipment Interface Module (EIM) for all Prestige IAQ and new RedLINK VisionPRO Thermostats, replacement for THM5421R1005, THM5421R1013 Repriced 9-12 Known for its durability and

Known for its durability and reliability

double-throw (SPDT) switch

Height: 17

Durable brass construction ensures longevity and reliability

Honeywell Home THM5421R1021 Equipment Interface Module (EIM) for all Prestige IAQ and new RedLINK VisionPRO Thermostats, replacement for THM5421R1005, THM5421R1013 Repriced 9-12 Known for its durability andEquipment 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. Four sensor inputs for wired sensors or dry contact devices. Used with all versions of Prestige IAQ Thermostats and the