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Digital programmable thermostat Honeywell T3M OpenTherm

Extended warranty 5 years

Digital programmable thermostat Honeywell T3M OpenTherm

  • Product code: T3H310A0045
  • EAN : 5025121380492
  • Manufacturer code: T3H310A0045
  • Warranty: 5 years

Digital thermostat Honeywell T3M OpenTherm for heating systems, setting range 5 ... 35 °C, measuring accuracy 0,5 °C. More information

  • Availability

    Standard delivery 3-4 working days. DHL express delivery 1-2 working days.

  • More than 5 pcs in stock  
Price without VAT € 98,31
Price with VAT € 118,96

Would you like to get a price offer? Contact us

Parameters and catalogs

Control Display
Design Wired
External sensor No
Frequency 50/60 Hz
Measurement accuracy 0,5 °C
Power 2xAA 1,5 VDC
Programme Weekly
Weight 0.40 kg

Datasheet download

Download PDF


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Thermostat T3M OpenTherm is designed for automatic time and temperature control of heating systems in homes and apartments according to adjustable time program and temperature. It is compatible with 24‐230V on/off appliances such as gas boilers, combi‐boilers and heat pump. It is also suitable for controlling zone valves. 

The T3M supports a device equipped with the OpenTherm® communication protocol.

This unit is the ideal solution for all who require reliable and precise control with a modern look, simple programming about operation.

Main features

  • 7 day program
  • OpenTherm® communication
  • Schedule options with 4 independent set‐points to suit comfort needs.
  • Room temperature information
  • OFF position has an integral frost protection setting atminimum 5 °C so that pipes in the house will never freeze.
  • Automatic time clock adjustment for “Daylight Saving Time”.
  • Thermostat is powered by alkaline batteries 2 x 1.5 V IEC LR6 (AA)
  • Battery life is 2 years, low battery warning
  • Wireless unit powered by 230 V
  • Setting range 5…35 °C
  • Measuring accuracy 0,5 °C

Not suitable for electrical heating applications (240 V).

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