Last updated on March 28th, 2018
What Are Atomizer 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 that is replaceable when it burns out. There are many atomizer types of atomizers, but they all have Ohm resistance.
Some atomizers, like the Triton Tank System from Halo Cigs have top coils. Others, like the Endeavor from Apollo use a bottom coil. Most of the newer atomizers have coils that are built into the atomizer such as Vaporfi's Rocket3.
Unless you are a very heavy vaper, atomizers should last for a few months. When you order new ones, get to choose your ohm resistance level.
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 atomizer 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 advanced vaporizers.
People who love a nice throat hit go for the lower ohm resistance, but experimentation is the key since your vape depends on other factors too.
Main Features of An Atomizer 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 an Atomizer 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
A good rule of thumb is that if you’re vaping with a lower battery input voltage (between 3.0 – 3.5) you can safely choose a lower ohm resistance.
On a standard eGo battery, the battery input voltage is usually between 3.3 and 3.7 volts so choose your atomizer’s ohms between (the very lowest) 1.5 and 3.4 ohms (the very highest).
What About Sub-Ohm Vaping?
Many vaporizers let you use a sub-ohm atomizer easily. The vaporizer automatically adjusts the wattage for you, yet can adjust the airflow to get a cooler vape or tighter draw.
Examples of These Easy-to-Use Vaporizers Are:
Vaporizers That Feature Both Adjustable Wattage and Voltage
For advanced vapers, there are vaporizers that accommodate sub-ohm atomizers and let you set either the wattage or the voltage. Halo Cigs' Reactor is an example of this advanced vaporizer. Yes, you get amazing flavor, and it can produce a lot more vapor, but off-the-chart vaping takes some know-how, it's not for everyone and it can be dangerous. We're seeing far fewer dual mode vaporizers these days as they are being replaced with TC (Temperature Conrol) devices.
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, Vaporfi and Halo.
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. Remember, unless you have a TC vaporizer, 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 the more 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.