DT135 Digital Wired Thermostat

A digital wired thermostat with pre-set economy and comfort modes with the simple touch of a button. One of the smallest thermostats on the market, the DT135 is easy to use and install, with 2 wire connection only.


Digital Room Thermostat

A digital room thermostat simply switches the heating system on and off as necessary. It works by sensing the air temperature, switching on the heating when the air temperature falls below the thermostat setting, and switching it off once this set temperature has been reached. Turning a room thermostat to a higher setting will not make the room heat up any faster. How quickly the room heats up depends on the design of the heating system, for example, the size of the boiler and the radiators.


Energy Saving

Preset economy and comfort control, self-learning algorithm for intelligent heating control, ensuring more efficient boiler control, selection of heating cycles for maximum efficiency of the system, pump protection: activates the pump for 1 min every 24h to prevent seizure (hot water heating). Temperature displayed at 0.1 ° C.

Ease of Use

Modern minimalistic design, 2 wire connection for easy wiring and installation. Low battery indicator (60 days warning).


Compatible with gas, oil or electric systems. Ideal for use with standard and combi boilers (On/Off; Relay: 230V 5(2)A), electric heating, zone valves.

Buy now

Our heating products are stocked in many home and DIY outlets across the UK.
Alternatively you can buy this product directly from the following websites.


Easy To Install and easy to use

Honeywell Home’s heating products have a great range of features that will allow you to control your heating more efficiently and help save you energy and money. All this is backed up by our 2 year product guarantee.

User guide & Instruction manualDeclaration of Conformation