{"product_id":"pro1-iaq-prot855i-wifi-programmable-thermostat-5h-3c","title":"PRO1 Iaq prot855i Wifi Programmable Thermostat 5H 3C","description":"\u003ch3\u003eProduct Description\u003c\/h3\u003e\u003cp\u003eThe PRO1 IAQ prot855i is a WiFi-enabled, programmable universal thermostat designed for complex residential and light-commercial HVAC systems. It supports up to 5 stages of heating and 3 stages of cooling, making it a capable control solution for multi-stage heat pump and conventional forced-air systems. The prot855i also provides integrated humidification and dehumidification control outputs, allowing a single thermostat to manage full indoor air quality alongside temperature. A large 8 square inch display gives technicians and end users a clear interface for configuration and daily operation. Licensed HVAC technicians typically specify and install this unit during system commissioning or thermostat upgrade projects.\u003c\/p\u003e\u003cp\u003eThis thermostat is suited for residential and light-commercial applications where multi-stage heating and cooling control is required alongside humidity management. Its universal compatibility makes it a strong candidate for retrofit installations in forced-air gas, oil, or heat pump systems. When full remote-access functionality is needed, the prot855i is compatible with the PRO1 IAQ R251S or R250S remote sensors, which are sold separately. WiFi connectivity enables remote monitoring and scheduling through a connected device.\u003c\/p\u003e\u003ch4\u003eKey Features\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003eWiFi-enabled for remote access and scheduling via connected device\u003c\/li\u003e\n\u003cli\u003eSupports up to 5 stages of heating and 3 stages of cooling\u003c\/li\u003e\n\u003cli\u003eIntegrated humidification and dehumidification control outputs\u003c\/li\u003e\n\u003cli\u003eLarge 8 square inch backlit display for easy on-site configuration\u003c\/li\u003e\n\u003cli\u003eUniversal programmable design compatible with a wide range of forced-air systems\u003c\/li\u003e\n\u003cli\u003eCompatible with R251S or R250S remote sensors (sold separately)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eCompatibility\u003c\/h4\u003e\u003cp\u003eThe prot855i is a universal programmable thermostat compatible with multi-stage heating and cooling systems. Remote sensor functionality requires the PRO1 IAQ R251S or R250S (sold separately).\u003c\/p\u003e\u003ch4\u003eInstallation Notes\u003c\/h4\u003e\u003cp\u003eInstallation should be performed by a licensed HVAC technician. Power down the HVAC system at the breaker and disconnect low-voltage wiring before removing the existing thermostat. Verify system wiring configuration and stage count before connecting terminals to ensure correct staging operation. Follow all applicable local codes and manufacturer wiring instructions when configuring humidification and dehumidification outputs.\u003c\/p\u003e\u003ch4\u003eTechnical Specifications\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeating Stages\u003c\/strong\u003e: 5\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCooling Stages\u003c\/strong\u003e: 3\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHumidity Control\u003c\/strong\u003e: Humidify and Dehumidify\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay Size\u003c\/strong\u003e: 8 square inches\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConnectivity\u003c\/strong\u003e: WiFi\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC\u003c\/strong\u003e: 095247201662\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch4\u003eStandard Information\u003c\/h4\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand\u003c\/strong\u003e: PRO1 IAQ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number\u003c\/strong\u003e: prot855i\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PRO1 IAQ","offers":[{"title":"Default Title","offer_id":51138777284914,"sku":"PROT855i","price":195.08,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0270\/4519\/9983\/files\/305534690.webp?v=1778263283","url":"https:\/\/voomisupply.com\/products\/pro1-iaq-prot855i-wifi-programmable-thermostat-5h-3c","provider":"Voomi Supply","version":"1.0","type":"link"}