Sub-Ohm Vaping vs. Mouth-to-Lung (MTL) Vaping

Vaping has never been more accessible or diverse, especially here in the UK. As technology continues to evolve, we see new devices popping up every year—each catering to different preferences, budgets, and lifestyles. Yet, despite the constant wave of innovations, two fundamental vaping styles remain at the heart of the experience: sub-ohm and mouth-to-lung (MTL).

Whether you’re a relative newcomer still figuring out the difference between coil resistances, or a veteran considering a change of pace, understanding these two styles can help you make an informed choice. In 2025, as TPD-compliant devices become ever more refined and e-liquids increasingly sophisticated, the sub-ohm vs. MTL conversation is more relevant than ever.

In this detailed guide, Select Vape Club will explore the unique characteristics, pros, cons, and best use cases for both sub-ohm and MTL vaping—helping you decide which style (or combination!) suits your life and vaping goals.

1. What Is Mouth-to-Lung (MTL) Vaping?

a) The Basics

MTL vaping refers to the inhalation technique in which you draw vapour into your mouth first, and then inhale it into your lungs. This is similar to the way you would smoke a traditional cigarette—hence why many new vapers, especially ex-smokers, gravitate toward MTL setups when making the switch from combustible tobacco.

b) Hallmarks of an MTL Setup

• Higher Resistance Coils (1.0Ω or above): MTL devices typically use coils with higher resistance, requiring lower wattage to function.

• Tighter Airflow: Mouth-to-lung tanks and pods often have smaller airflow openings, resulting in a draw that feels closer to a cigarette pull.

• Lower Vapour Production: Because of the reduced airflow and wattage, MTL devices produce fewer clouds—but still deliver robust flavour.

• Throat Hit: MTL setups often yield a stronger throat hit with higher nicotine strengths, which many smokers-turned-vapers find satisfying.

c) Ideal E-Liquids for MTL

MTL devices generally work best with 50/50 or 60PG/40VG blends (or similar). These thinner liquids wick more easily in tighter coil setups. Many MTL vapers also use nicotine salts due to the smoother, faster nicotine delivery—perfect for those looking to replicate the immediate satisfaction of a cigarette without overwhelming harshness.

2. What Is Sub-Ohm Vaping?

a) The Basics

Sub-ohm vaping refers to using coils with a resistance of less than 1.0 ohm—often 0.5Ω, 0.2Ω, or even lower. This design requires higher wattage to heat the coil efficiently, which in turn allows for much larger vapour production. Hence, sub-ohm is often associated with “cloud-chasers”—vapers who relish huge plumes of vapour and intense flavour intensity.

b) Hallmarks of a Sub-Ohm Setup

• Lower Resistance Coils (<1.0Ω): These coils draw more power, heating e-liquid quickly for massive vapour output.

• High Wattage: Sub-ohm devices commonly operate at 30–100W (and can go beyond), providing ample power.

• Open Airflow: Large airflow channels promote greater vapour volume and cooler hits, even at higher wattages.

• High VG E-Liquids: Most sub-ohm users prefer 70VG or higher for thicker clouds and smoother inhales.

c) Who Is It For?

Sub-ohm setups often appeal to those who:

• Love dense clouds and bold flavour.

• Don’t mind carrying around larger devices or extra batteries.

• Enjoy direct-to-lung (DTL) inhales, pulling vapour straight to their lungs.

3. The Key Differences: A Quick Overview

If you’re unsure which style might suit you, consider these critical distinctions:

1. Inhalation Method:

• MTL: Mouth, then lungs (similar to smoking).

• Sub-ohm/DTL: Straight to lungs, more akin to taking a deep breath.

2. Nicotine Strength:

• MTL: Often uses higher nicotine (6–20mg, or even more with nic salts).

• Sub-ohm: Typically uses lower nicotine (0–6mg) because large vapour volume can intensify nicotine delivery.

3. E-Liquid Ratio:

• MTL: 50/50 or 60PG/40VG for better wicking in smaller coils.

• Sub-ohm: 70VG or higher to produce dense clouds and avoid dry hits.

4. Hardware & Power:

• MTL: Smaller, low-wattage devices (e.g., pod systems, MTL tanks).

• Sub-ohm: Larger mods, high wattage, and sub-ohm tanks with bigger coils.

5. Vapour Production:

• MTL: Discreet, moderate vapour.

• Sub-ohm: Large, billowy clouds and more intense flavour.

6. Battery & Liquid Consumption:

• MTL: More conservative battery usage and e-liquid consumption.

• Sub-ohm: Drains batteries faster and uses more e-liquid due to higher power and airflow.

4. The Pros and Cons of MTL Vaping

Pros

1. Natural Transition for Ex-Smokers
   MTL’s inhalation style feels familiar to many who’ve recently quit cigarettes, providing a comfortable, less overwhelming shift.

2. Efficient Nicotine Delivery
   With higher nicotine strengths, MTL can be quite cost-effective. You’ll likely consume less e-liquid overall while still satisfying cravings.

3. Discreet Vapour Production
   If you prefer subtlety—like in the office or among non-vaping friends—MTL clouds are more modest.

4. Lower Power, Lower Cost
   MTL devices often work well at lower wattages (10–20W), meaning smaller, cheaper mods and longer battery life.

Cons

1. Less Cloud Production
   If you love chasing big clouds, MTL might feel underwhelming.

2. Less Airflow Variety
   Some MTL tanks or pods have limited airflow adjustments, offering fewer customisation options.

3. Potentially Harsher with the Wrong E-Liquid
   Vaping a higher-PG, high-nicotine blend at sub-ohm wattages can feel extremely harsh, so you’ll need the right coil and device.

4. Can Feel Restrictive
   Vapers who enjoy airy draws might find MTL’s tight pull restrictive and prefer more open airflow.

5. The Pros and Cons of Sub-Ohm Vaping

Pros

1. Massive Vapour & Bold Flavour
   Sub-ohm setups can produce exceptionally dense clouds, capturing nuanced taste notes in your favourite e-liquids.

2. Direct Lung Inhales
   Some find direct-lung vaping more satisfying, akin to taking a deep breath of fresh air rather than sipping a cigarette-like draw.

3. Wide Device Selection
   From advanced box mods to smaller high-power pod mods, sub-ohm hardware offers diverse designs, adjustable wattages, and custom coil types.

4. Lower Nicotine, Smooth Hits
   Using 3mg or 6mg e-liquid can yield a smooth yet flavourful experience without overpowering throat hits.

Cons

1. Higher E-Liquid Consumption
   Because you’re generating more vapour, you’ll likely spend more on juice—especially if you’re partial to premium brands.

2. Frequent Battery Charging
   High wattage = faster battery drain, so you’ll need to keep spares or be prepared to charge more often.

3. Less Discreet
   Giant clouds can draw attention. If you’re in a social setting or prefer stealth, sub-ohm might be impractical.

4. Higher Initial Cost
   The advanced mods and sub-ohm tanks with mesh coils can be pricier than basic MTL kits.

6. Which Style Fits You Best?

Deciding between MTL and sub-ohm often hinges on your personal circumstances, preferences, and goals. Here are a few typical scenarios:

1. Recent Switch from Smoking

• Recommendation: MTL or a pod device with higher nicotine e-liquids. The inhalation style feels natural, and you’ll get the nicotine fix you’re used to.

2. Looking for Big Clouds & Strong Flavour

• Recommendation: Sub-ohm is the clear winner. It excels at producing thick vapour and intense taste, particularly when paired with high VG e-liquid.

3. Need Something Compact & Discreet

• Recommendation: MTL setups—particularly pod systems—are typically smaller, quieter, and less conspicuous.

4. Outdoor or Social Vaping

• Recommendation: This one depends on how you feel about clouds. If you’re in a crowded public space, MTL might be more polite; if you’re among fellow cloud-chasers, sub-ohm can be a blast.

5. Budget Considerations

• Recommendation: MTL might be more economical, given lower wattage usage and slower e-liquid consumption. Sub-ohm can add up due to coil and e-liquid costs, though the payoff in vapour volume may be worth it for some.

7. Bridging the Gap: Pod Mods and Variable Devices

In 2025, device innovation is bridging the gap between these two distinct styles. Many modern vape kits now feature:

• Swappable Coils: Some devices come with MTL coils and sub-ohm coils in the same kit, allowing you to switch styles without buying a brand-new setup.

• Adjustable Airflow & Wattage: Pod mods with adjustable airflow slots and variable wattage can be used for either style by changing the coil and e-liquid accordingly.

• Smart Coil Recognition: Advanced chipsets can automatically detect coil resistance and recommend an optimal wattage range, making it easier for new vapers.

This new breed of ‘crossover’ pod mods helps vapers experiment without investing in multiple devices. It’s a fantastic solution for someone who wants mouth-to-lung during work hours but likes big clouds on the weekends!

8. Sub-Ohm vs. MTL in the UK: TPD Compliance & Regulations

Since the Tobacco Products Directive (TPD) took effect in the UK, vaping products have certain legal limitations:

• 2ml Maximum Tank Capacity: Tanks sold in the UK are limited to 2ml. For sub-ohm vapers who go through juice quickly, this can mean more frequent refills.

• 10ml E-Liquid Bottles (If Containing Nicotine): Larger sizes (known as shortfills) contain 0mg nicotine, and you add nic shots if required.

• Nicotine Strength Limits: Up to 20mg/ml (2%) is allowed. This typically suits MTL vapers needing a stronger nic hit, though nic salts can deliver a smoother experience at higher strengths.

While TPD compliance affects both MTL and sub-ohm devices, the 2ml tank restriction tends to impact sub-ohm vapers slightly more—though many manufacturers now produce TPD-compliant mini-tanks with short, ‘bubble-glass’ expansions or other creative solutions.

9. Top Hardware Recommendations for 2025

a) Best MTL Kits

1. Aspire Nautilus Series (Pods or Tank)
   A classic choice for tight, flavourful draws, featuring coils ranging from 1.6Ω to 1.8Ω. The newer Nautilus pods are TPD-friendly and easy to refill.

2. Innokin T-Series (T18, T22, Etc.)
   A favourite among ex-smokers, known for reliable performance, simple design, and great mouth-to-lung inhales.

3. Voopoo Doric or Vinci Pod Kits
   Modern MTL pods with adjustable airflow and coil swaps, giving you the option to try sub-ohm coils if you ever fancy an airy draw.

b) Best Sub-Ohm Kits

1. SMOK RPM or Nord Series
   Hybrid pod mods that cater to both MTL and sub-ohm with coil swaps. Known for robust vapour production and ample power in a compact size.

2. GeekVape Aegis Series
   Rugged mods and sub-ohm tanks that stand up to daily wear. Ideal for those who need a durable setup capable of higher wattages.

3. Voopoo Drag Series
   Offers powerful chipsets, fast firing, and a range of PnP coil options for sub-ohm. The Drag range is famed for precise wattage control and advanced coil detection.

10. Recommended E-Liquids & Nicotine Strength

a) MTL Favourites

1. Nic Salt Lines (10–20mg)
   Brands like Nasty Salts or Pod Salt deliver a swift nicotine rush with minimal harshness. Perfect for lower-wattage MTL pods.

2. 50/50 Blends
   Classic tobacco or menthol 50/50 juices from reputable UK brands (e.g. Dinner Lady or IVG) offer a familiar, satisfying vape.

3. Tobacco & Menthol Hybrids
   Excellent for ex-smokers seeking that reminiscent cigarette-like throat hit.

b) Sub-Ohm Stars

1. High VG (70VG or Above)
   Dessert or fruit-heavy shortfills like Just Jam, Elements, or Riot Squad produce thick clouds and intense flavours.

2. 3mg or 6mg Nicotine
   Lower nicotine levels are recommended due to the massive vapour volume. Going higher could lead to a harsh hit.

3. Exotic Fruit Medleys
   Sub-ohm setups excel at delivering layered fruit profiles—mango-pineapple combos, berry mixes, or tangy citrus bursts taste especially vibrant in a DTL device.

11. Transitioning from MTL to Sub-Ohm (and Vice Versa)

a) MTL → Sub-Ohm

1. Lower Your Nicotine
   If you’re used to 12mg or 18mg, dropping to 6mg (or even 3mg) is key for sub-ohm to avoid harshness or nicotine overload.

2. Learn to Direct Inhale
   A sub-ohm draw is open and airy. Practise inhaling directly to your lungs rather than sipping vapour into your mouth first.

3. Adjust Wattage Gradually
   Don’t jump from 10W to 70W instantly. Move up slowly and see how your coil performs—watch for burnt tastes or too-hot vapour.

b) Sub-Ohm → MTL

1. Experiment with Higher Nicotine
   You may want more nicotine if you’re reducing the amount of vapour you inhale. Try 6–12mg or even nic salts.

2. Appreciate Stealth
   Enjoy the freedom of smaller clouds—ideal for discreet public use.

3. Play with Airflow
   If your device allows it, close down airflow to replicate a tighter MTL draw. You may also need to switch to an MTL-focused coil.

12. Common Questions (FAQs)

Q1: Is sub-ohm vaping more dangerous than MTL?

Answer: Both styles are generally considered safe when using TPD-compliant devices and e-liquids, following proper battery safety, and respecting recommended wattage ranges. Sub-ohm devices use higher power, so you should ensure your batteries and mod can handle the load—always buy reputable batteries and charge them correctly.

Q2: Does MTL have better flavour than sub-ohm, or vice versa?

Answer: Flavour is subjective and depends on the device, coil quality, and e-liquid. Sub-ohm tends to produce more vapour and can bring out complex flavour notes. However, many vapers swear MTL’s narrower airflow provides a more concentrated, nuanced taste. It’s partly personal preference—try both!

Q3: Can I use any e-liquid in my device?

Answer: Not exactly. For MTL, stick to 50/50 or 60/40 PG/VG e-liquids and moderate-to-high nicotine. For sub-ohm, use 70VG+ with lower nicotine. Using a high-VG juice in a tiny MTL coil can lead to dry hits; conversely, using high-PG or high-nic e-liquid in a sub-ohm device can be harsh.

Q4: Are there TPD-compliant sub-ohm tanks with more than 2ml capacity?

Answer: Officially, TPD restrictions limit the UK retail sale of tanks to 2ml. Many manufacturers supply additional bubble glass or extension kits outside the UK. If you buy a TPD-compliant kit, you’re often limited to 2ml unless you purchase optional expansions from elsewhere.

Q5: Which is cheaper in the long run: sub-ohm or MTL?

Answer: MTL is often cheaper because it uses less e-liquid and lower-wattage devices, thus saving battery life. Sub-ohm can be more expensive due to coil costs, higher juice consumption, and sometimes pricier mods. However, the added intensity and cloud production might be worth it for enthusiasts.

13. Future Trends in 2025: Where Does Each Style Stand?

a) Continual Innovation

In 2025, vape manufacturers focus on ease of use and flexibility. We’re seeing more devices that can handle both MTL and sub-ohm simply by swapping coils and adjusting airflow. The gap is shrinking, giving vapers incredible versatility.

b) Emergence of Hybrid E-Liquids

Some UK brands are experimenting with e-liquids that perform well in both MTL and sub-ohm contexts. These might feature 60VG/40PG or balanced formulas that won’t overwhelm a small coil yet still deliver decent clouds in a sub-ohm tank.

c) Eco-Friendly Initiatives

Expect to see more eco-friendly packaging and refillable pod systems to reduce waste—particularly with disposable vapes facing tighter scrutiny. Sub-ohm and MTL devices alike will likely incorporate recyclable materials or biodegradable pods, aligning with growing sustainability trends.

d) Enhanced Nicotine Salts for Both Styles

Nic salts aren’t just for MTL anymore. Some sub-ohm devices can handle lower-strength nic salt blends (e.g., 3–6mg), delivering a smooth DTL experience with minimal throat harshness. This could further blur the lines between the two styles.

14. Tips for an Optimal Experience (Regardless of Style)

1. Stay Hydrated
   Both PG and VG can dehydrate you; sipping water keeps your throat and taste buds happy.

2. Prime Your Coils
   Always saturate new coils properly before vaping to avoid burnt hits and extend coil life.

3. Clean Your Tank or Pod
   Regular cleaning prevents residue build-up, preserving flavour quality and coil longevity.

4. Store E-Liquids Correctly
   Keep them in a cool, dark place, away from direct sunlight, to maintain flavour and nicotine integrity.

5. Experiment
   Don’t be afraid to try new e-liquids, coils, or wattage settings. Part of the fun of vaping is the customisation and exploration.

15. Final Thoughts: Embrace Your Style, or Try Both

Choosing between sub-ohm and MTL needn’t be an either-or decision. Many vapers enjoy both methods, depending on the situation—MTL for work commutes or social events, and sub-ohm at home when they want those glorious clouds. The beauty of 2025’s vaping landscape is the flexibility and innovation that allows you to switch effortlessly.

Ultimately, your vaping style should reflect your personal taste, comfort, and circumstances. If you enjoy the cigarette-like pull with a satisfying throat hit and less fuss, MTL is a fantastic long-term choice. If you crave thick vapour, intense flavour, and the excitement of variable wattage, sub-ohm might be your calling.

At Select Vape Club, we pride ourselves on helping UK vapers find a kit, coil, and e-liquid that feels tailor-made. From TPD-compliant MTL pods to cutting-edge sub-ohm tanks, we stock a wide range of trusted brands, each thoroughly vetted for quality and compliance. Check out our online store or drop us a line if you need personalised guidance in choosing your perfect match.

Ready to explore sub-ohm’s towering clouds or MTL’s cigarette-style simplicity? We’ve got your back. Embrace your curiosity, experiment with new gear, and delight in the ever-evolving world of vaping—2025 style!