The time to replace the old room thermostat has come, waiting to turn on the heating system and improve the comfort of your home or office. We have already given you 10 useful tips to prepare your home for winter, so today we present the situations that occur most frequently when you decide to replace an existing thermostat or programmable thermostat with a more performing model, or if you want to change the housing of the thermostat, or add a zone to the system.

Attention! Always contact your trusted installer: in most cases, it will be necessary to work on the electrical system and it is important that the operations are carried out in maximum safety, also to avoid product malfunctions.

Replace a 220V powered thermostat with a battery-operated thermostat

It may happen that the model you have chosen and evaluated best suited to your needs is not available with a 220V power supply but only with battery. In this case, the professional will have to isolate the power cables before connecting to the boiler and installing the new thermostat. All you have to do is insert the batteries, remembering to replace them when requested by the device, and program it.

Replace a battery-operated thermostat with a 220V powered thermostat

A situation similar to the previous one, but more complex as the installer will have to “split” the power supply from an existing circuit, create a special junction box with all the safety devices required by law, isolate the two boiler contact cables from 220V power supply to avoid interference and, finally, install the new thermostat.

Replace an old thermostat with a new one, powered in the same way (batteries or 220V)

This is the simplest situation to manage, as it will be enough to remove the old thermostat and connect the boiler contact cables (and power supply, if any) and install the new model. It’s a good opportunity to check the condition of the cables and electrical contacts and make sure that your new thermostat communicates better with the heating system.

Add a zone to the heating system

Sometimes arises the need to divide the home or office into several areas, so that the temperature can be adjusted independently in different rooms. It’s possible to divide the living area from the sleeping area, or still leave the heating to a minimum in less frequented areas of the building.

To create different zones, the first step is to understand, with the help of a professional, if it’s possible to install a zone valve to the boiler, which will then be connected to the second thermostat. Consider that, in this case, the main or pre-existing thermostat will control the activation of the boiler, while the second will only allow the regulation of the temperature of the zone, without acting directly on the boiler. If, on the other hand, you want all your thermostats to be autonomous and independent, you will need to provide additional devices (relays) to automatically switch the boiler on or off.

Another alternative is to opt for a radio-controlled model.

Change housing to a 220V or battery powered thermostat

The old thermostat is in an incorrect position, perhaps in an area subject to drafts, or near heat sources.

In this case, it will be necessary to consult an electrician to bring the power cables, if powered at 220V, and the connection cable to the boiler in a new junction box. Also in this case it is easier to opt for a radio-controlled model.

Install a new radio-controlled room thermostat

A solution to change the location of the thermostat or to create more zones in the home is to choose a new device with a radio function. With a battery-powered radio model, in fact, it will not be necessary to pull the power cables, but just install its receiver on the boiler and position the thermostat where you want.

The same goes for creating multiple zones by connecting the receiver to the corresponding zone valve. Each receiver and each thermostat are already paired with a unique code so as not to create interference, and it is possible to install several in the same building.

Replace an IMIT room thermostat or chronothermostat

All IMIT thermostats are easily interchangeable with each other because the fixing distance that they mount on the DIN 503 box and wiring are the same: an advantage designed to reward the loyalty of our customers and our installers!

If you are undecided about which thermostat to install based on your type of system, we recommend reading these two articles:

Or, browse our site, download our catalog or consult a preview of the instruction manuals of our products for home and office comfort to find the one that best suits you. For further requests, send an email to Our staff will reply as soon as possible.