{"product_id":"honeywell-thm5421c1008-visionpro-iaq-equipment-interface-module-hvac-control","title":"Honeywell THM5421C1008 VisionPRO IAQ Equipment Interface Module HVAC Control","description":"\u003ch4\u003eDescription\u003c\/h4\u003e\n\u003cp\u003eThe Honeywell THM5421C1008 is an equipment interface module designed for use with VisionPRO IAQ thermostat systems. It enables centralized control of heating, cooling, humidification, dehumidification, and ventilation using a simplified 3-wire connection. This module enhances HVAC system integration and performance in residential and light commercial applications.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003ctable width=\"100%\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHoneywell\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHVAC Controls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTHM5421C1008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eInterface Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEquipment Interface Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSystem Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eVisionPRO IAQ \/ EnviraZONE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHeat\/Cool or Heat Pump with Auxiliary Heat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eVoltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e20–30 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFrequency\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e60 Hz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFan Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.6 A Running\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeat Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.0 A Running\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower Method\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eHardwired\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTerminal Designations\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMultiple (R, Rc, Rh, Y, Y2, G, W1, W2, etc.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSensor Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOutdoor, Remote, Discharge (Optional)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e185 mm x 116 mm x 34 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eColor\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePremier White®\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eIncluded Components\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEquipment Interface Module Only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.9 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About THM5421C1008\u003c\/h4\u003e\n\u003cp data-start=\"386\" data-end=\"1036\"\u003eThe THM5421C1008 is part of the Honeywell VisionPRO IAQ system, engineered to act as the central wiring and control interface between the thermostat and HVAC equipment. It allows advanced system control including dual-fuel heat pump management, indoor air quality regulation, and ventilation coordination. Designed for compatibility with VisionPRO IAQ thermostats and EnviraZONE panels, it reduces installation complexity by requiring only three wires between the thermostat and module. With support for optional outdoor, discharge, and remote sensors, it provides precise environmental control and efficient system operation.\u003c\/p\u003e\n\u003cp data-start=\"1038\" data-end=\"1056\"\u003e\u003cstrong data-start=\"1038\" data-end=\"1054\"\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul data-start=\"1057\" data-end=\"2213\"\u003e\n\u003cli data-start=\"1057\" data-end=\"1147\"\u003eCentral Equipment Interface: Connects thermostat to HVAC equipment for unified control\u003c\/li\u003e\n\u003cli data-start=\"1148\" data-end=\"1229\"\u003e3-Wire Communication: Simplifies installation and reduces wiring requirements\u003c\/li\u003e\n\u003cli data-start=\"1230\" data-end=\"1331\"\u003eMulti-System Control: Manages heating, cooling, humidification, dehumidification, and ventilation\u003c\/li\u003e\n\u003cli data-start=\"1332\" data-end=\"1422\"\u003eDual-Fuel Compatibility: Supports advanced heat pump and auxiliary heat configurations\u003c\/li\u003e\n\u003cli data-start=\"1423\" data-end=\"1509\"\u003eIndoor Air Quality Control: Enables humidification and dehumidification management\u003c\/li\u003e\n\u003cli data-start=\"1510\" data-end=\"1590\"\u003eVentilation Management: Controls fresh air exchange for improved air quality\u003c\/li\u003e\n\u003cli data-start=\"1591\" data-end=\"1676\"\u003eSensor Compatibility: Supports outdoor, discharge, and remote temperature sensors\u003c\/li\u003e\n\u003cli data-start=\"1677\" data-end=\"1763\"\u003eFlexible Terminal Design: Multiple input\/output terminals for system customization\u003c\/li\u003e\n\u003cli data-start=\"1764\" data-end=\"1831\"\u003eHardwired Power Supply: Ensures stable and continuous operation\u003c\/li\u003e\n\u003cli data-start=\"1832\" data-end=\"1917\"\u003eEnviraZONE Integration: Compatible with zoning panels for expanded system control\u003c\/li\u003e\n\u003cli data-start=\"1918\" data-end=\"1988\"\u003eCompact Wall Mount Design: Easy installation in HVAC control areas\u003c\/li\u003e\n\u003cli data-start=\"1989\" data-end=\"2213\"\u003eReliable Performance: Designed for consistent operation in residential HVAC systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe THM5421C1008 delivers the reliability and precision required for advanced HVAC system integration and indoor air quality management.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":49104770498816,"sku":"THM5421C1008","price":270.48,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/s-l1600_d86cc76b-8f25-4a17-9586-1ca66b4f4969.webp?v=1785532538","url":"https:\/\/alotechparts.com\/products\/honeywell-thm5421c1008-visionpro-iaq-equipment-interface-module-hvac-control","provider":"Alo Tech Solutions","version":"1.0","type":"link"}