Key Features

• Specifically designed to work with Open-Therm boilers
• Temperature range: 5–35°C
• Frost protection
• Optimum stop, start & delayed start features that learn how the room heats
• Two wire, OpenTherm connections are ideal for use with combination boilers
• On-screen heat demand icon makes start up testing easy
• Simple push button access to configuration menus
• Away mode with specific temperature set (number of days changeable)
• Automatic Summer/Winter time change
• 7-day programming with 7-day, 5/2-day or single-day schedules
• 4/6 independent time and temperature settings
• Optional backlight with extended light on time period
• Burner 'ON' symbol
• Warranty: 1 year

Honeywell T4M Programmable Thermostat Overview

The Honeywell T4M programmable thermostat is a great way to make your home more comfortable and energy-efficient, with a temperature range between 5 and 35°C.

This thermostat comes with frost protection, automatic summer/winter time change, an optional backlight on the display and so many other features to make life a little easier and ensure its longevity.

Programs and Functions

The Honeywell T4M includes 7-day programming with 7-day, 5/2-day or single-day schedules, 4/6 independent time and temperature settings and an optimum stop, start and delayed start features, which learn how your room heats.

This thermostat also comes with a Holiday mode, allowing you to temporarily adjust the heating functions and temperature when you're not home.

Plus, the simple push button to access configuration menus makes it easier to amend heating controls in a heartbeat.