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Honeywell Home THM5421R1021/U Prestige 2-Wire IAQ Equipment Interface Module
THM5421R1021/U|QC-THM5421R1
Honeywell Home THM5421R1021/U Prestige 2-Wire IAQ Equipment Interface Module
THM5421R1021/U|QC-THM5421R1
Key Features
- 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.
Key Features
- 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.
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Become an ADI CustomerKey Features
- 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.

Honeywell Home
Honeywell Home THM5421R1021/U Prestige 2-Wire IAQ Equipment Interface Module
THM5421R1021/U | QC-THM5421R1
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Overview
Specifications
Documents
Product Overview
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.
Main Features
- 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.
General Information
Name: Honeywell Home THM5421R1021/U Prestige 2-Wire IAQ Equipment Interface Module
Category: Honeywell Home, Intrusion, Alarm Control Panels & Keypads, Control Panel Modules
UPC Code: 085267328180
Country of Origin: Mexico. Country of origin is subject to change.
Specifications
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ADI Part Number QC-THM5421R1 Brand Name Honeywell Home Manufacturer Resideo Manufacturer Part Number THM5421R1021/U Product Line Prestige Product Model THM5421R1021/U Product Name Prestige 2-Wire IAQ Equipment Interface Module Product Type Equipment Interface Module Weight 15.20 oz
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Connectivity Technology Wired
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Application/Usage Gas, oil, electric, heat pump, forced warm air, hot water, steam or gravity Color Gray Depth 1.6" Height 9.31" Width 4.81"
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Length 1.63"
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Compatibility All Prestige 2-Wire IAQ Thermostats, All Prestige IAQ Thermostats, VisionPRO Thermostats with RedLINK technology. Country of Origin MX