To understand how temperature control works, what it does, and how it can help your vaping experience improve and be safer, you firstly must know what it is. Temperature Control, or TC, is technically defined as the mode through which the box/mod regulates the intensity in order to keep the coil at a temperature that is defined by the user.

Manufacturers say that it is important—if not the most important goal, to maintain a constant temperature so that the safety of the user is guaranteed. However, this fact is often misunderstood, or misused by some, arguing that regardless of the temperature, the safety on the user lies on the device itself, or the quality of the juice bottles used.

Why is controlled temperature important?

First, you must understand, or at least have enough background on how vapes function and how it heats up to start up the whole process. Let’s talk science:

As explained by The Vaping Post, a coil is most of the time a resistive wire that is folded in a spring-like cylinder with non-touching circular turns. The wire’s resistivity (in Ω.m-1) defines how strongly a given wire, generally an alloy, opposes to the flow of electrons, or electric current. Coils are labelled according to its resistance, a value defined by an Ohm (Ω).

Where does the heat come from? Heat is produced when electrical energy is dissipated into the wire when electrons are scattered by the atoms present in the alloy, the so-called Joule effect.

What’s the connection of temperature control with wire resistance, you may ask? To put it simply, the resistance of wires changes with temperature—affecting and changing everything. When a material, in this case, a wire was exposed to a higher temperature, it becomes a superconductor. Only after this transition, its resistance can be predicted from its temperature.

How Temperature Control Works

As a general rule, the resistance (R) of a coil increases with temperature (T). In the temperature control mode, the chipset of the box measures on a very fast rate the resistance when incrementing intensity levels. The chipset basically increases the intensity of the current up to reaching a certain value (R) of the resistance. This set point value (R) corresponds to the desired temperature (T).

However, to obtain this temperature (T) with more or less of accuracy, the procedure strongly depends on the calibration parameters—which measures the normal value of resistance at room temperature, as well as the temperature coefficient of resistance.

Back to simple vaping explanation, in ordinary variable voltage / variable wattage (VV/VW) mods, you choose a wattage or a voltage setting and vape. The setting you choose dictates how much current is sent to your coil. This way, regardless of the differences between voltage and wattage settings, they work in the same basic way. Each setting sends a certain amount of electricity through your coil for however long you’re pressing the button down. This heats up the coil and vaporizes your e-juice. Although the technology is called temperature control, there are no actual heat sensors or thermostats built into the device. What TC mods do is monitor coil resistance as it is heated. 

Basic, right? So what happens when you use Temperature Control?

As the name suggests, TC focuses on the temperature of the coil rather than the voltage or wattage you’re working at. Simply speaking, it automatically determines the temperature of the coil, decide if its becoming too hot or too cold. On its own, it will act upon it—increase the heat when its getting cooler, or decrease the temp when it becomes too hot. Still, their main aim is to limit the temperature at whatever value you set.

Should you use it?

The benefits of temperature control vaping should be clear. If you want to avoid horrible dry puffs, along with the formaldehyde and potential health hazards they bring with them, temperature control is the perfect solution. At the same time, you don’t have to worry about getting dry puffs because you’re using a higher-VG e-juice on a device that isn’t well-equipped to deal with it.

It is recommended for chain vapers too! Often, they would normally risk running into a dry puff, TC will ease of the power before that happens.

The lifespan of your coil will definitely improve, keeping the maximum temperature at level, which protects your wick from getting burnt. This is one of the most common reasons coil heads get ruined.

What’s the catch?

Not much, but it will be noticeable that vapor production will often be reduced a little bit on TC devices. While day to day, casual vape users wouldn't mind, this can turn cloud chasers, who live for puffing great volumes of thick clouds.