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Airflow & Zugtechnik

Direct Lung (DL) - Understanding lung vaping and setting it up correctly

Direct Lung guide: How DL vaping works, difference to MTL, airflow setup and coil selection. Practical tips for your sub-ohm experience from 18 in Switzerland.

Direct Lung, or DL for short, refers to the vaping technique where you inhale the vapour directly into your lungs – without it passing through your mouth. This technique produces thick clouds, intense flavour and a stronger draw than with traditional MTL vaping. To ensure DL vaping is enjoyable, your device, coil, wattage and e-liquid must all work well together. In this guide, you’ll learn how Direct to Lung works, how DL differs from MTL, and what you should look out for when setting up your device to ensure a smooth, safe vaping experience.

Direct Lung (also known as Direct to Lung, DL or lung vaping) is an inhalation technique in which the vapour travels directly from the mouth and throat into the lungs in a single draw – similar to taking a deep breath of fresh air. In contrast, with Mouth-to-Lung (MTL), the vapour is first drawn into the mouth and then, in a second step, into the lungs, just like with a cigarette.

Technically speaking, DL requires an open airflow and a more powerful coil. Typical setups include atomisers with high airflow, sub-ohm coils below 1.0 ohms – often between 0.15 and 0.4 ohms – and power outputs between 40 and 100 watts. Because more e-liquid is vaporised per puff, consumption also increases noticeably: 5 to 10 ml per day is not uncommon. This makes DL the choice for vapers seeking vapour volume and flavour intensity – not for beginners who are just switching from cigarettes.

When DL vaping, you open your atomiser’s airflow control wide so that there is hardly any resistance felt during the draw. You inhale the vapour quickly and evenly directly into your lungs, hold it briefly, and exhale. The draw lasts about 2 to 4 seconds – longer than with MTL.

Restricted Direct Lung (RDL)

RDL is a hybrid form: the draw is slightly more restricted, with the airflow slightly closed. You vape directly into your lungs, but with more resistance. RDL is often used at 20 to 40 watts and coils of around 0.6 to 0.8 ohms – a good compromise between flavour, vapour production and e-liquid consumption.

Cloud Chasing

Those aiming for maximum vapour clouds use DL with very low resistances (below 0.2 ohms) and high wattages. This variant requires suitable batteries, high-quality coils and safe handling of the setup.

Direct lung vaping stands or falls on the right combination of hardware and e-liquid. These points are crucial:

  • Atomiser: Choose a model with a large airflow and a wide drip tip (810). Sub-ohm tanks or RDAs/RTAs are designed for DL.
  • Coil resistance: For full DL, aim for between 0.15 and 0.4 ohms; for RDL, between 0.5 and 0.8 ohms. Pay attention to the wattage recommendation on the coil.
  • Mod: A mod with at least 80 watts and two 18650 batteries (or a built-in battery of 3000 mAh or more) delivers consistent performance throughout the day.
  • E-liquid blend: A high VG content (70/30 or 80/20) ensures dense vapour. Nicotine should be low-strength – 3 mg/ml or less, as you inhale significantly more vapour per puff.
  • Avoid nicotine salt: High-strength nicotine salt (20 mg/ml) is intended for MTL and can quickly lead to a scratchy throat when using DL.

A common mistake is trying to switch an MTL pod system to DL. This rarely works: the airflow, coil and tank volume are not designed for it. It’s better to choose a suitable sub-ohm kit from the start.

Which is better: DL or MTL?

There is no ‘better’ option – it depends on your goal. MTL is designed for those switching from cigarettes and for high nicotine strengths. DL offers more vapour and flavour intensity, but uses significantly more e-liquid and is suited to low nicotine strengths.

Can I use less nicotine with DL?

Yes, and it’s actually recommended. Because more vapour – and therefore more nicotine – is inhaled per puff, 3 mg/ml or 6 mg/ml are standard. Higher strengths are usually found to be unpleasant when vaping directly into the lungs.

How many watts do I need for Direct to Lung?

That depends on the coil. A 0.3-ohm coil typically runs at 50 to 70 watts, a 0.15-ohm coil at 70 to 100 watts. The manufacturer’s specification on the coil is the safest guide.

Is DL vaping suitable for beginners?

For vaping novices with no prior experience, DL is usually too intense. Those switching from cigarettes are better off starting with MTL or a pod system. After a few weeks, you can switch to RDL or DL.

Direct Lung is the technique for vapers seeking dense clouds, an open draw and a strong flavour. Key factors include a suitable sub-ohm atomiser, a powerful mod and a VG-heavy e-liquid with low nicotine content. If you want to put together your DL setup, you’ll find suitable models in our selection of atomisers – it’s also worth taking a look at the mods and compatible coils. Take your time to compare and experiment your way to your ideal setup.

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