PRO1 IAQ T855iSH Universal WiFi Smart Thermostat – 2H/2C Multi-Stage, 7-Day Programmable

Description

Upgrade any residential or light commercial HVAC system with the PRO1 IAQ T855iSH WiFi Thermostat, a universal smart thermostat engineered exclusively for HVAC professionals. Whether you’re installing on a multi-stage heat pump, a conventional gas/electric system, a PTAC unit, or a small commercial building, the T855iSH delivers powerful control, remote connectivity, and a large, easy-to-read display in one affordable package.

Compatible with up to 3 stages of heat and 2 stages of cool (5 stages with auxiliary heat on heat pump systems), the T855iSH supports virtually any application a contractor will encounter in the field. Built-in WiFi connectivity pairs seamlessly with the PRO1 Connect 2.0 App, giving homeowners full remote control of their comfort from anywhere — and giving technicians a faster, smarter installation experience.

With Mobile Tech Settings, installers can configure the thermostat directly from their phone instead of pressing buttons at the wall, dramatically reducing setup time and programming errors. Remote Test Mode lets technicians energize individual terminals (Y1, Y2, W/E, W2, O, B, G, H, D) right from the app to verify system operation without walking back and forth between the equipment and the thermostat. The result: faster, easier, more reliable installations on every job.

Backed by a 5-year warranty and Title 24 / ENERGY STAR compliance, the T855iSH is the smart, affordable choice for pros who demand reliable performance and homeowners who want modern comfort control.

Features:

• Universal Compatibility: Works with conventional and heat pump systems, including PTAC mode for hotels, condos, and light commercial applications
• Multi-Stage Control: Up to 3 stages of heat and 2 stages of cool (5 total stages with auxiliary heat on heat pumps)
• Programming Options: 7-day programmable or non-programmable operation
• WiFi Enabled: Remote control and monitoring via the PRO1 Connect 2.0 mobile app (iOS & Android)
• Mobile Tech Settings: Configure system settings directly from your smartphone for faster installs
• Remote Test Mode: Energize and test individual terminals from the app — no trips back to the thermostat
• Large 8 sq. in. Display: Bright, backlit, easy-to-read screen
• Auto Changeover: Automatic switching between heating and cooling modes
• Adjustable Heat & Cool Temperature Swing: Fine-tune cycle frequency for comfort and efficiency
• Adjustable Setpoint Limits: Ideal for rentals, offices, and commercial spaces
• Programmable Fan: Custom fan scheduling for improved air circulation and IAQ
• Filter Change Reminder: Helps homeowners stay on top of maintenance
• Room Temperature Calibration: Ensure accurate readings in any installation
• Remote Indoor Sensor Capable: Average temperatures or relocate sensing point
• Outdoor Temperature Sensor Capable: Display outdoor temperature on the thermostat and app
• 3 Fan Speeds: Compatible with multi-speed fan applications
• Permanent Memory: Settings are retained during power loss
• Compressor Short Cycle Protection: Protects HVAC equipment from damage
• Terminals: Rh, Rc, C, Y, Y2, W/E, W2, G, B, O, S1, S2, H, D
• Certifications: ENERGY STAR Certified, Title 24 Compliant
• Warranty: 5-Year Limited Warranty

Applications:

Single-family homes, multi-family housing, apartments, condos, hotels (PTAC), small offices, retail spaces, and any light commercial building requiring multi-stage HVAC control with smart connectivity.