Honeywell Home T4R

The Honeywell Home T4R is a programmable RF room thermostat supplied with a separate heating receiver in the reference kit.

Model Identification

Brand: Honeywell Home
Company: Resideo
Series: T4
Model: T4R
Reference ordering code: Y4H910RF4003
Specification scope: UK reference kit

Room Thermostat Specifications

Room-unit power2 × AA batteries

Room-to-receiver linkRF, 868.0–868.6 MHz

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

Manufacturer communication range30 m in a residential building environment; actual range varies

Receiver Specifications

Power supply230V AC

Equipment controlOn/Off relay; check exact receiver documentation for OpenTherm

Dimensions (W × H × D)110 × 110 × 40 mm

Specification scope: This profile identifies Y4H910RF4003 as its kit reference. Regional receiver variants can differ, so the family overview does not replace the kit wiring guide. Receiver supply and room-unit batteries are separate.

Compatibility and Installation

The receiver is wired to the heating appliance. Confirm the exact receiver version and terminals when choosing On/Off or OpenTherm control; RF communication alone does not establish the equipment protocol. Follow the exact thermostat and equipment manuals; electrical installation should be performed by a qualified installer.

Wireless Thermostats · Honeywell Home manufacturer · Honeywell Home T4 · Honeywell Home T4M

Official Resources

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

Official T4R reference product page
Official T4 family specification sheet
Additional manufacturer technical sheet (French)

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