HVAC System

Understanding The Role Of A Thermostat In HVAC System

Your body needs to stay at a certain temperature. Similarly, it is essential for our surrounding too to stay at a specific temperature to make us comfortable.

To get this comfort, human has invented certain technological appliances that provide the required conditions. For instance, in summer, we need to cool down the room, while during winter, we need to make it warm.

HVAC Appliances, such as air conditioners, furnaces, and boilers, provide the heating and cooling of your surroundings to provide you with compatible living conditions.

However, you might have experienced sometimes feeling hot, and as you put on the air conditioner, you start feeling too cold and need to switch on the heaters. These temperature fluctuations are annoying, and you need yet another device to get a constant temperature.
Yes, that’s right! This device is called a thermostat! Let’s look deeper into the concept.

What Is A Thermostat?

A thermostat is a temperature regulating appliance that senses the fluctuations in the temperature of a room or a surrounding and acts in accordance with stabilizing the temperature.

The human body has an automated temperature mechanism that constantly adjusts to keep itself within 37°C (98.6°F)
This is the temperature that needs to be constantly maintained by the outer surrounding, too, in order to make a place or a system dwellable.

What Are Thermostats Used For?

We already know that a thermostat regulates the temperature around you. Let us see some other applications a thermostat is used.
It is used mainly in heating and cooling devices to set the temperature according to fluctuations.

Some applications it is used for include air conditioners, HVAC systems, water heaters, building heating, central heating, kitchen equipment such as ovens & refrigerators, and medical and scientific incubators.

What Role Does A Thermostat Play In An HVAC System?

A thermostat connects to the HVAC systems and works as the brain of your heater and air conditioner. It allows you to choose when to turn on the system and the exact temperature of your home throughout the day.

Its most fundamental use is to control when to turn on your heating or air conditioning.

It displays the temperature and allows you to set the temperature you want. The unit will adjust the current temperature by cooling or heating the air.

How Does A Thermostat Work?

Thermostats regulate heat by expanding their internal metallic strips. This strip carries the current through the connected circuit, which activates the heating.

Further, as the strip heats up, one of the metals expands, opening up the circuit that ultimately turns off the heating, thus proceeding with the room’s cooling.

To operate this mechanism, you will find a temperature dial on your thermostat that you can use to adjust your preferred temperature accordingly. This sets the point for the circuit to switch off and on.

However, users do not need to get into much of the details, as the only job of a user in this entire procedure is to set the desired temperature, and the mechanical components of the thermostat will do the rest!

However, these devices can also malfunction, but the good thing is your regular HVAC repair and service technician can look into it, and you do not have to go the extra mile for its maintenance.


In order to keep the temperature more or less constant, you should keep switching heaters on and off.

However, devices like a thermostat make this easy for you; all you have to do is trust these smartly designed appliances called thermostats to do the job for you!

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