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Alarm.com | T25 Z-Wave Smart Thermostat with Auto Wire Detection & Battery Option | ADC-T25

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SKU:
ADC-T25

The thermostat that installs where there is no C-wire. It runs on 24 VAC or on four AA batteries, which removes the single most common reason a smart thermostat job stalls at the wall.

Built for the installer

Automatic wire detection and configuration is the other half of that. Rather than identifying the existing wiring, working out the system type and configuring it manually, the thermostat detects what is connected and sets itself up. On an unfamiliar HVAC system that turns a careful job into a quick one, and it removes a category of miswiring.

It supports Z-Wave Long Range alongside SmartStart and S2. Long Range matters in larger properties and outbuildings where a standard Z-Wave mesh struggles to reach without repeaters.

Key features

  • No C-wire required, running on 24 VAC or four AA batteries
  • Automatic wire detection and configuration, removing manual setup and a class of miswiring
  • Z-Wave Long Range for larger properties where a standard mesh needs repeaters
  • SmartStart enrollment by scanning a code rather than manual inclusion
  • S2 security for networks that also carry locks

System requirements

Requires 24 VAC or four AA batteries, and an Alarm.com account with Z-Wave automation on a compatible panel or hub. Rated for indoor use at 41F to 95F.

Brand:
Alarm.com
Dimensions:
4.7 x 4.7 x 1 in (12 x 12 x 2.6 cm)
Communication:
Z-Wave SmartStart, Z-Wave S2, Z-Wave Long Range
Form factor:
Wall-mount smart thermostat
Power input:
24 VAC or 4x AA batteries, no C-wire required
Setup:
Automatic wire detection and configuration
Operating temp:
41F to 95F (5C to 35C)
Does this thermostat need a C-wire?
No. It runs on 24 VAC or on four AA batteries, which is the main reason to specify it over the ADC-T40K-HD on a system with no common wire.
What does automatic wire detection do?
The thermostat detects what is connected and configures itself, rather than requiring the installer to identify the wiring and set the system type manually. It removes a common source of miswiring on unfamiliar HVAC systems.
What is Z-Wave Long Range for?
It extends range well beyond a standard Z-Wave mesh, which helps in larger properties and outbuildings where reaching the hub would otherwise need repeaters.