Last updated on February 5th, 2020
What Are Atomizer Coil Ohms? How Does Ohm Resistance Affect your Vaping Experience?
If you’re vaping an ecigarette personal vaporizer, there’s a good chance you have a tank or clearomizer that contains an atomizer coil that is replaceable when it burns out. There are many types of atomizer coils, but they all have Ohm resistance.
There was a time when atomizers used top coils, but today, even the word “atomizer” has fallen by the wayside. Today it's all about coils and their level of resistance determined by their oHms.
What is OHM Resistance?
All coils generate heat that is driven by the battery. The heat turns your e-liquid into a vapor, but some coils create more heat than others. Why? It’s because coils with Low Electrical Resistance (or Lower ohm numbers) create more heat and a warmer vapor. Those with High Resistance (or Higher ohm numbers) produce a cooler vapor.
How Does OHM Resistance Affect Your Vape?
The ohm rating contributes to your throat hit as well as the amount of vapor your ecig produces. Keep in mind that those features are also determined by your battery’s input voltage as well as your e-liquid’s PG/VG e-liquid ratio.
A low ohm coil is between 1.5 – 1.8ohms; a standard ohm coil is generally between 2.4 – 2.8ohms; and high ohm is anything 3.0ohms or more. SubOhm resistance is also available for most modern vaporizers.
People who love fuller flavor, a nice throat hit and bigger vapor clouds go for the lower ohm resistance, but experimentation is the key since your vaping device depends on other factors too.
Main Features of a Coil with Lower OHMS
- Your vapor with be hotter
- You’ll get more of a throat hit
- Your battery will lose it’s charge faster
- You’ll burn up your e-liquid faster
- You’ll get more unpleasant dry hits because you run down your e-liquid faster
- Some flavors can taste better (or worse) depending on your e-juice
Main Features of Coils with Higher OHMS
- Your vapor with be cooler
- You’ll get less of a throat hit
- Your battery will hold it’s charge longer
- Your e-liquid will last longer
- Some flavors can taste weaker, but smoother depending on your e-juice
I recommend going with the coil selections offered for each device. All choices will be compatible with the battery's wattage.
What About Sub-Ohm Vaping?
Many vaporizers let you use sub-ohm coils easily. The vaporizer automatically adjusts the wattage for you, yet can adjust the airflow to get a cooler vape or tighter draw.
A good example of an easy-to-use vaporizer is Vaporfi's Rocket 3 Vape Pen.
Advanced Temperature Control TC Vaporizers for Sub-Ohm Vaping
Temperature control is now popular with advanced vapers who want to get the most out of sub-ohm vaping. In a nutshell, rather than setting the power (watts) of your vaporizer, you set a target temperature. The device automatically adjusts the power when you hit that limit so you don't burn your coils, your throat, or reach a heat level that produces the dreaded “formaldehyde hemiacetals“. In other words, you'll avoid those “dry hits” and you'll get better, safer performance.
You can buy a wide range of TC Vaporizers at DirectVapor or Vaporfi.
Here are 2 charts showing optimum ohm resistance for different battery voltage/watts. The first chart is for above-0 ohm resistance. The second is for sub-ohm vaping.
For Sub-Ohm coils (under 1 ohm) using a high powered vaporizer, begin by setting your wattage low, and adjust up to no higher than 27Watts. Vaping in the orange zone can cause dry hits and burn wicks.
What about Dual Coil Atomizers?
The recent popularity of Dual coil atomizers makes things a bit more complicated since 1.8 ohm is the total resistance of two higher ohm coils cut in half. I know it sounds a bit backwards, but that how ohms work. Because there are now two coils, the total 1.8 ohm resistance will vape like a 2.0 – 2.5 ohm single coil atomizer.
Also remember, ohms and your battery’s input voltage combine to determine your vape experience.
Here are some very basic guidelines based on my preferences.
Single coil Duel coil
eGo/Vape Pen Batteries 2.0 – 2.5 ohms. 1.5 – 1.7 ohms
Variable Volt Batteries (3.7- 6 Volts) 1.7 – 3.2 ohms 1.5 – 2.5 ohms
If you are using duel coil atomizers, Variable Voltage Batteries are recommended by resellers. According to Apollo e-cigarettes who sells popular dual coil tanks from Kanger and Aspire, some eGo battery volts may be too low to power the coils.
Even with these basic guidelines, your e-liquid can also affect your vaping experience.
If you're using a higher wattage battery choose a lower ohm resistance. A high or Max VG e-liquid will perform better!
There is no one formula for everyone.
Feel free to comment if you have any questions or if you would like to share your experience in selecting the best ohm resistance for your vaporizer.