Description
Product Overview
One of the T25’s standout features is its ease of installation. It auto-detects HVAC wiring and does not require a C-wire thanks to its four (4) AA batteries. The thermostat connects via Z-Wave and supports SmartStart, S2 Security, and Long Range, making it ideal for smart home systems using Alarm.com.
Through the Alarm.com platform, users can create energy-saving schedules, control settings remotely, and receive detailed HVAC health reports with Pro HVAC Monitoring. This helps catch small issues before they become big problems.
The T25 also supports the Alarm.com Temperature Sensor for room-by-room comfort and accuracy. Built to withstand common indoor conditions, it operates between 41°F to 95°F and is easy to control with simple button navigation.
- Display: OLED touch display
- Power: 24 VAC / four (4) AA batteries (No C-wire required)
- Dimensions (H x W x D): 4.7″ x 4.7″ x 1″ (12 x 12 x 2.6cm)
- Operating Temperature: 41°F to 95°F (5°C to 35°C)
- Communication: Z-Wave SmartStart, Z-Wave S2, Z-Wave Long Range
- HVAC Compatibility: Universal 24VAC systems including forced air, heat pump (O/B), radiant, and dual fuel
- Stages: Up to 3 stages of heat and 2 stages of cool
- Humidity Control: Yes
- Ventilation Control: Supports HRV, ERV, and external air baffle (via Z-terminal)
- Included Accessories: Thermostat, trim plate, screws and anchors, user guide, four (4) AA batteries

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