Honeywell T4 Thermostats, 24 → 230 V, +21 → +35 (Upper) °C, +5 → +21 (Lower) °C

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### Thermostats

A thermostat is a regulating device that uses remote sensors or internal sensors to detect the rise and fall of temperature in a room, system or device. Thermostats are used for regulating and controlling the temperature in central heating systems, air conditioners, water heaters, HVAC systems, kitchen equipment and medical devices and much more. Offering a level of convenience and efficiency over and above analogue counterparts, digital thermostats allow you to get the best from your heating, ventilation and air conditioning systems. Their programmable option also allows you to optimise your climate control energy spending.RS offer a range of thermostats such as enclosure thermostats, mechanical HVAC thermostats, digital and programmable HVAC thermostats, digital, wireless, and smart thermostats with Wi-Fi. You can find out more in our [thermostats guide](https://uk.rs-online.com/web/content/discovery/ideas-and-advice/thermostats-guide).

### What Does a Thermostat Do?

It regulates the temperature of a liquid in a tank, or in conjunction with air conditioning units to monitor the air in a room/system. The thermostat simply switches the system off or on whenever necessary so that a constant temperature can be maintained. At home, room thermostats are used to switch on the heating and radiators. When the room is cold and once the temperature has reached the level set, the programmable thermostat switches the heating off.

### Why Use a Digital Programmable Thermostat?

As analogue thermostats require mercury to function, digital thermostats present a cleaner alternative. Not only that, but programmable thermostats offer a more granular level of customization when it comes to setting options for heating systems and boilers. From holiday mode to cleaning mode programmes, and with manual override available, you can have total control of your home or workplace climate and hot water control. With backlight LCD touchscreens available, digital HVAC thermostats are very user-friendly and can offer real-time information about your energy use, temperature control and optimisation. With models capable of WiFi communication to an HVAC unit or control centre, they can be very versatile in where they are placed.RS supplies high-quality energy-saving digital and smart thermostats. They are sourced from leading brands including Honeywell, Schneider Electric, STEGO and of course RS PRO.

Thermostats can help support a healthy building by improving Thermal Health



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