Programmable Thermostat

This replacement thermostat is compatible with the Resideo TH8321WF1001 VisionPRO 8000 WiFi Programmable Thermostat and functions as a direct substitute for this widely-used HVAC control device. Engineered for 24 VAC systems, this 7-day programmable touchscreen thermostat accommodates up to 3 heat and 2 cool stages for heat pump applications, or up to 2 heat and 2 cool stages for conventional systems, making it suitable for both residential and commercial HVAC installations. The unit features integrated WiFi connectivity operating on 802.11b/g/n at 2.4 GHz, enabling remote system management through Resideo's Total Connect Comfort mobile application. Amazon Alexa compatibility provides voice control capabilities for modern smart building integrations. An onboard humidity sensor delivers precise environmental monitoring with independent humidification control (10-60% RH range) and dehumidification control (40-80% RH range), supporting optimal indoor air quality. Advanced programmability includes weather-responsive operation capabilities through wired sensor or Internet-based data integration, allowing schedules to adapt to local conditions. Customizable service reminders help facility managers maintain equipment performance and plan preventative maintenance. The thermostat features U1 terminal connections for dry contact outputs to auxiliary IAQ equipment including humidifiers, dehumidifiers, ventilators, and additional heating/cooling stages. Additional S1 terminals support indoor sensor connections for expanded monitoring capabilities. This thermostat replacement is ideal for HVAC contractors, facility managers, and building automation technicians seeking reliable climate control solutions with modern connectivity features and comprehensive system support.