Guide to Sub-Ohm Vaping For Beginners

Sub-ohm vaping has taken the vaping community by storm, offering a next-level experience for cloud chasers looking to make the most of their vaping experience. But for many vapers, both new and experienced, sub-ohm vaping remains somewhat of a mystery despite its growing popularity. Because of the lack of widespread knowledge about sub-ohm vaping, there’s also a certain amount of controversy that’s often associated with it – particularly for those who have questions about how it works, what its benefits are, and whether or not it’s worth trying.

Here’s everything you need to know about sub-ohm vaping, including what it is, how to enjoy it safely, and recommendations for getting off to an excellent start.

What is Sub-Ohm Vaping?

Sub-ohm vaping is a specific style of vaping that’s rooted in a physics concept called Ohm’s Law. Created by German physicist Georg Ohm, this law essentially states that the current that passes through a conductor from a single point to another must be directly proportional to the voltage that is supplied, as well as inversely proportional to the specific resistance of the conductor. So, what does that mean in layman’s terms? Basically, the higher the voltage and the lower the resistance of the device you’re working with, the higher level of current that will be able to pass through (and vice versa).

Sub-ohm vaping makes use of this law of physics to boost the amount of power available to the vaper. Utilizing specially-designed vape devices and accessories, you can vape at a lower resistance to maximize the current flow. As a result, thicker and more generous vapor clouds that are incredibly flavorful will be produced for your vaping enjoyment.

How Does Sub-Ohm Vaping Work?

When the vaping community first considered ways to maximize flavor and cloud production, it was thought that battery power needed to be increased. The thought process was that by reaching higher voltage, vapers could achieve the power levels they wanted. However, amperage limits quickly highlighted the failings of that method. Instead, it was discovered that reducing the resistance allowed for greater current flow, which produced the impressive clouds vapers were hoping for.

If you’ve looked at even a few types of atomizer coils, you’re likely at least somewhat familiar with the idea of resistance level. Resistance level is defined in ohms and relates to the amount of current that is able to pass through a given coil. As the resistance is reduced and the voltage is kept constant, the current is able to increase significantly. This allows it to reach a much higher temperature and thus produce much more vapor.

A typical atomizer coil has a resistance level of anywhere between 1.5 and 3 ohms, but a coil that has a resistance of less than 1 ohm is the ticket to sub-ohm vaping. The considerably lower resistance level creates the ideal conditions for you to max out on power in the best way possible, efficiently creating massive, flavor-packed clouds.

Sub-ohm vaping requires one of three vaping set-ups:

  • A rebuildable dripping atomizer that requires the manual dripping of e-liquid between every few puffs
  • A rebuildable tank atomizer that eliminates the need to manually drip e-liquid, relying on the essential components of a clearomizer and built-in coil
  • A sub-ohm tank that can typically be paired with most vape mods on the market, using disposable, built-in coils

What’s a Sub-Ohm Tank?

Until recently, options for a sub-ohm vape set-up nearly always included at least minor challenges. Choosing a rebuilding dripping atomizer (RDA) meant that you would have to manually drip your vape juice onto the wick every few puffs, which can be frustrating for vapers who want convenience and ease of use. A rebuildable tank atomizer (RTA) was the next option and remains fairly popular for the quality and flavor of the vapor they produce.

However, sub-ohm tanks have changed the game by making it incredibly easy for vapers to make the switch to sub-ohm vaping – whether they want to sub-ohm full-time, or just occasionally. Most sub-ohm tanks can be attached as an upgrade option to any mod that operates at 30 watts or higher, providing a comparable, high-quality experience to RTAs that’s user-friendly and convenient. Unlike RTAs, sub-ohm tanks utilize disposable coils.

Best Vape Juices for Sub Ohm Vaping

The Best Vape Juice & E-Liquids for Sub-Ohm Vaping

For many vapers, their sub-ohm vaping focus begins and ends at the device and tank itself. However, it’s also important to consider the vape juices you’re going to vape. Because sub-ohm vaping utilizes significantly higher temperatures than standard vaping, not all vape juice flavors can take the heat.

When you’re choosing a vape juice for your sub-ohm vape, look for one with a balanced VG/PG ratio. Without a good balance of these two components, as well as high-quality ingredients, you’re likely to experience a lack of flavor or even an unpleasant burnt taste. Many sub-ohm vapers prefer a slightly higher ratio of VG to PG (due to the reduced throat hit), as well as lower nicotine levels – so don’t be afraid to experiment a bit to find your ideal sub ohm vape juice options.

Sub-Ohm Vaping with VV/VW Devices

If you know vapers that practice sub-ohm vaping, you might have heard them discussing variable voltage (VV) and variable wattage (VW) devices as part of the experience. However, VV/VW devices aren’t actually necessary for sub-ohm vaping, thanks to the variety of high-power regulated devices that you can find on the market today. Years ago, sub-ohm vaping was a method that required vapers to bump up the power beyond the safe capacity of regulated devices, but that’s no longer the case.

Instead, you can find a number of devices that allow you to choose your preferred resistance level and calibrate it as needed, often while performing better than the old-school sub-ohm builds on mechanical vape mods.

Sub-Ohm Vaping Safety


Battery safety is a major part of all vaping styles, but especially so with sub-ohm vaping. It’s important to choose the correct battery for your device, with unprotected IMR and hybrid lithium batteries being the most popular and often safest options due to their specialized chemistry and construction. You should only ever use batteries from a reputable source and trusted brand, and immediately discard dented or damaged batteries.

For sub-ohm vaping, most vapers choose batteries with high continuous amperage limits. Stick to your specific batteries’ amperage limit to ensure safe vaping, and always take a few seconds to use an Ohms reader to double-check your batteries’ resistance level and any potential shorts.

Best Sub Ohm Mods

Keeping your mod clean and well-maintained is key to responsible vaping, especially if you’re going to go sub-ohm. Check all threads, contacts, vent holes, and the switch, and keep an eye on the feel of your spring-loaded switch (if applicable). Using your mod’s locking mechanism when you’re not vaping is a smart and easy way to add an extra layer of protection.

Perhaps most importantly, you should absolutely never use an unvented mod for sub-ohm vaping. Vents are the only way heat can escape the sub-ohm mod, and they also make it possible for gases to vent out in the event of battery failure. The more vents and the larger they are, the better.

You’ll also want to consider the voltage drop of your mod, aiming for one with a fairly low level. Look at mods that are built with a single piece tube, a magnetic switch, and fixed position contacts for optimal options.

Pros of Sub-Ohm Vaping

Sub-ohm vaping has become an extremely popular option in the vaping community, and for good reason. Today’s sub-ohm methods offer a safe and simple way to maximize the quality and flavor of your vapor, taking the concept of cloud chasing to an entirely new level. Another pro of sub-ohm vaping is the increased ability to calibrate your vaping experience, providing considerable flexibility for vapers who understand the foundational principles of how vaping works.

Recommended Mod Kits for Sub-Ohm Vaping

Getting set up with a sub-ohm starter kit is an excellent way to ensure that you’ll have everything you need to get started and that all your pieces and parts will be compatible. Choosing a good kit depends largely on personal preference, as well as your preferred vape style.

At DIRECTVAPOR, we carry a range of sub-ohm kits from several of the most respected brands in the industry, so you can easily find one that’s the perfect fit for you. Here are just a few of our most popular, highly-recommended mod kits for sub-ohm vaping:

Our collection of sub-ohm starter kits includes options at every price point and from all your favorite brands, with plenty of features that make it easy to enjoy your sub-ohm vaping experience from the very first puff.

Browse Premium Sub-Ohm Vaping Devices and Accessories from DIRECTVAPOR

If you’re looking to jump into the world of sub-ohm vaping and take your vape experience to the next level, the first step is to find a sub-ohm vape device that fits your vape style. DIRECTVAPOR offers a wide selection of sub-ohm vape devices and accessories from the top brands and manufacturers in the industry, providing you with plenty of options for enjoying an excellent sub-ohm experience.

Browse our collection of sub-ohm vaporizers and accessories and learn more about crafting your perfect vape experience on the DIRECTVAPOR blog and vape guide library today.


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