Resideo (Honeywell Home) THM5421R 1021 equipment interface module-OUT OF STOCK
$97.1497.14Resideo (Honeywell Home) THM5421R 1021 equipment interface module, use with all Prestige IAQ and RedLINK VisionPro thermostats to control up to 4 stages of heat and 2 stages of cooling in a heat pump system or 3 stages heat and 2 stages cooling in a conventional system, has 3 sets of Universal IAQ contacts for humidification, dehumidification and ventilation plus 4 sensor inputs for wired sensors or dry contact devices
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This is an official Resideo (Honeywell Home) replacement part
Honeywell THM5421R 1021 equipment interface module, use with all Prestige IAQ and RedLINK VisionPro thermostats to control up to 4 stages of heat and 2 stages of cooling in a heat pump system or 3 stages heat and 2 stages cooling in a conventional system, has 3 sets of Universal IAQ contacts for humidification, dehumidification and ventilation plus 4 sensor inputs for wired sensors or dry contact devices