A Honeywell Home T4 programmable thermostat on a table in a living room.

The T4 programmable thermostat

The T4 is a versatile 7-day programmable thermostat, available in both wired and wireless options. It is compatible with a variety of boilers and heating systems, ensuring straightforward installation and easy programming.

The T4 programmable thermostat

Compatible with multiple heating and cooling systems and quick to install, the T4 programmable thermostat offers a wide variety of functionalities making it the preferred choice for a diverse range of installations.

Designed for compatibility

T4 programmable thermostats are designed to work with on/off and OpenTherm^® compatible heating and cooling appliances, such as boilers and district heating systems. Featuring both wired and wireless versions, they're designed to suit a variety of homes, and for a multitude of system applications.

Cost effective simple installation

The T4 series aims to make your everyday life easier. Fast commissioning saves a lot of time and energy, especially in mass installations. The clear, user-friendly digital display with recognisable icons makes installation and configuration simple.

Programmable, adjustable, customisable

Life can be unpredictable. The T4's preset programme gives your customers an extensive choice of pre-programmed settings including 7 or 5/2 scheduling with up to six periods per day.

Product comparison Table
Compare	Y4H910RF4003 T4R Wireless Programmable Thermostat (Table mounted)	T4H110A1021 T4 wired wall mounted Thermostat only (spare)	T4H310A3032 T4M wired OpenTherm® Thermostat only (spare)
REFERENCE NUMBER	Y4H910RF4003	T4H110A1021	T4H310A3032
COLOUR OPTIONS	White	White	White
HEAT/COOL	Heat and cool	Heat and cool	Heat and cool
HONEYWELL HOME PRODUCT COMPATIBILITY	—	—	HCC100
APPLIANCE COMPATIBILITY	Compatible with 24-230V on/off appliances such as gas boilers, combi-boilers, zone valves, wet underfloor heating.	Compatible with 24-230V on/off appliances such as gas boilers, combi-boilers, zone valves, wet underfloor heating.	OpenTherm^® Boilers
WARRANTY	*5 years	*5 years	*5 years