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HONEYWELL HOME · RESIDEO · WIRED ROOM THERMOSTAT

Honeywell Home T4M

The Honeywell Home T4M is a wired programmable thermostat for OpenTherm appliances. It combines local schedules with modulating heating control.

Model Identification

Brand: Honeywell Home
Company: Resideo
Series: T4
Model: T4M
Reference ordering code: T4H310A3032
Specification scope: European reference

Room Thermostat Specifications

Room-unit powerOpenTherm supply (reference SKU catalog)
Equipment controlWired OpenTherm modulation
Temperature setting range5–35°C (technical data table)
ScheduleFour or six periods per day; daily, weekly or 5+2 options
Schedule time step15 minutes
DisplayBacklit segment display
Frost-protection mode5°C
Dimensions (W × H × D)136 × 97 × 28 mm
Specification scope: The T4H310A3032 catalog entry identifies OpenTherm as its power source. A common battery row appears in the shared T4 family sheet; this profile uses the model-specific supply entry.

Compatibility and Installation

Use the T4M with a compatible OpenTherm appliance and verify the supported bus connection. Do not substitute an On/Off thermostat wiring diagram for the OpenTherm terminals. Follow the exact thermostat and equipment manuals; electrical installation should be performed by a qualified installer.

Related Pages

Wired Thermostats · Honeywell Home manufacturer · Honeywell Home T4 · Honeywell Home T4R

Official Resources

Reference data checked against Resideo model-specific catalog information and official documentation on 11 October 2026.

Official T4M reference product page
Official reference SKU catalog
Official T4 family specification sheet

AirAlign is an independent informational resource and is not affiliated with Honeywell Home or Resideo.