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Honeywell YTHM5421R1010 Equipment Interface Module Kit with 2 Duct Sensors.

Honeywell YTHM5421R1010 Equipment Interface Module Kit with 2 Duct Sensors. (YTHM5421R1010)

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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,...
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