Smart Shield Systems
Smart Thermostat HD (ADC-T40K-HD)
The Alarm.com Smart Thermostat HD pairs a full-color HD touchscreen with pro-grade controls—ideal for comfort, energy savings, and clean installs. It features mechanical wire detection, an Easy Setup Wizard, HVAC health monitoring with on-screen alerts/reports, and secure Z-Wave Plus (SmartStart, S2) integration for scenes and schedules in the Alarm.com app. 24 VAC with a C-wire is required.
Why Choose This with Smart Shield Systems
- Done right, end-to-end: we verify 24 VAC/C-wire, land each conductor, run the Easy Setup Wizard, and test heat/cool/fan stages.
- Smarter automations: we connect it to your security system for geo-fencing, scenes, and schedules that actually save energy.
- HVAC health checks: we enable system diagnostics and monthly performance reports so you spot issues early.
- Accessory control: we program humidifier/dehumidifier and ventilation (HRV/ERV/external baffle) via configurable terminals.
Key Features
- HD color touchscreen with local setup wizard and mechanical wire detection.
- Z-Wave Plus with SmartStart & S2 security for robust app control, scenes, and schedules.
- HVAC health monitoring with on-screen alerts and monthly reports.
- Supports humidifier, dehumidifier, and ventilation (HRV/ERV/external air baffle).
- Works with Alarm.com remote temperature sensors and platform features like geofencing and occupancy.
- ENERGY STAR® certified smart thermostat.
Product Specifications (At-a-Glance)
- Model: ADC-T40K-HD (Smart Thermostat HD)
- Power: 24 VAC only; C-wire required; 24 V HVAC systems (not 120/240 V line-voltage).
- Display/Hardware: HD color touchscreen (magnetically attaches to base); thermostat base is the Z-Wave node; headless operation possible.
- Dimensions / Operating Range: 4.7″ × 4.7″ × 1.07″, 41–95 °F (5–35 °C).
- Communications: Z-Wave Plus (SmartStart, S2); Bluetooth present (per ENERGY STAR listing).
- HVAC compatibility: Up to 3 Heat / 2 Cool, dual-fuel, heat pump (O or B), forced air, humidifier/dehumidifier, ventilation.
- Terminals: RC, RH, W/W2, Y/Y2, G, O, B, C, Z1, Z2 (Z1/Z2 configurable: W3, humidifier, dehumidifier, or ventilation).
Compatibility Notes
- Pairs with Alarm.com-enabled systems (via Z-Wave Plus). Local schedules are available, but when joined to a hub/panel you should manage schedules in the app.
- Remote temp sensors (e.g., ADC-S40-T) and platform features like geofencing/occupancy are supported.
Popular Use Cases
- Whole-home comfort with humidity & ventilation control
- Energy-saving scenes (e.g., Arm Away → eco setpoints)
- Proactive maintenance using monthly HVAC performance reports
Frequently Asked Questions
Yes. It’s a 24 VAC thermostat and requires a C-wire for power.
Yes—up to 3H/2C, heat pump with O or B, and dual-fuel are supported. We’ll configure staging and reversing-valve options during install.
Yes. Z1/Z2 terminals can be assigned to humidifier, dehumidifier, or ventilation (HRV/ERV/external baffle) control.
A full-color high-resolution touchscreen plus a modern UI, with mechanical wire detection and an Easy Setup Wizard for fast commissioning.
Yes—the ADC-T40K-HD is listed by ENERGY STAR as a certified smart thermostat.
Additional Resources
Download ManualReady for smarter, healthier comfort?
Smart Shield Systems will install and configure your Smart Thermostat HD, set up scenes/schedules, enable health monitoring, and tune humidity/ventilation—so your home stays comfortable and efficient, automatically.