{"product_id":"honeywell-home-thm5421r1021-equipment-interface-module-24v-module-thm5421r1005","title":"Honeywell Home THM5421R1021 Equipment Interface Module 24V (Module) THM5421R1005","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\n\u003cp\u003eHoneywell Home THM5421R1021 is an Equipment Interface Module (EIM) that interfaces Prestige IAQ and RedLINK VisionPRO thermostats with HVAC equipment. The module provides multistage control for heat pump and conventional systems, IAQ device contacts, sensor inputs, and RedLINK wireless integration. It operates at 24V and supports manual or automatic changeover for heating and cooling system configurations.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eControls up to 4 heat\/2 cool for heat pump systems and 3 heat\/2 cool for conventional systems.\u003c\/li\u003e\n  \u003cli\u003eIncludes three universal IAQ contacts for humidification, dehumidification, and ventilation plus four wired sensor or dry contact inputs.\u003c\/li\u003e\n  \u003cli\u003eRedLINK enabled for VisionPRO integration; 24V operation with manual and automatic changeover support.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eProduct Highlights\u003c\/h4\u003e\n\u003cp\u003eMultistage HVAC control, IAQ contact integration, four sensor inputs, RedLINK connectivity for Prestige IAQ and VisionPRO thermostats.\u003c\/p\u003e\n\u003ch3\u003eProduct Information\u003c\/h3\u003e\n\u003ch4\u003eStandard Information\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: HONEYWELL HOME\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: THM5421R1021\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: Honeywell Home\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: THM5421R1021\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type\u003c\/strong\u003e: Equipment Interface Module (EIM)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eInput Voltage\u003c\/strong\u003e: 24V\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eStages\u003c\/strong\u003e: 4 Heat \/ 2 Cool (Heat Pump); 3 Heat \/ 2 Cool (Conventional)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApplication\u003c\/strong\u003e: Heating, Cooling\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eChangeover\u003c\/strong\u003e: Manual, Auto\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eIAQ Contacts\u003c\/strong\u003e: Three universal IAQ contacts (humidification, dehumidification, ventilation)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSensor Inputs\u003c\/strong\u003e: Four sensor inputs for wired sensors or dry contact devices\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eFeatures\u003c\/strong\u003e: RedLINK enabled; Humidification and dehumidification control\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompatible With\u003c\/strong\u003e: Prestige IAQ thermostats and RedLINK VisionPRO thermostats\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplaces\u003c\/strong\u003e: THM5421R1005, THM5421R1013\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer\u003c\/strong\u003e: Honeywell Home\u003c\/li\u003e\n\u003c\/ul\u003e\n","brand":"HONEYWELL HOME","offers":[{"title":"Default Title","offer_id":51620799938866,"sku":"THM5421R1021","price":171.21,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/53ef9eca703f078866a1d0b0088ba8f0.jpg?v=1787346544","url":"https:\/\/voomisupply.com\/products\/honeywell-home-thm5421r1021-equipment-interface-module-24v-module-thm5421r1005","provider":"Voomi Supply","version":"1.0","type":"link"}