Sub-Ohm Tank – What is it in Vaping? Definition & Guide

Definition

A Sub-OhmTank is a vape tank fitted with factory-made coils that have a resistance below 1.0 ohm. Designed for sub-ohm vaping, it produces large, dense vapour clouds and intense flavour by allowing high-wattage power to flow through low-resistance coil heads. Unlike rebuildable atomisers, a sub-ohm tank uses pre-built, screw-in coils, making it an ideal bridge between a simple Kit“>starter kit and advanced rebuildables. Its purpose is to deliver direct-to-lung (DTL) inhales with minimal fuss while still offering customisation through adjustable airflow and interchangeable coils.

Technical Details

Sub-ohm tanks rely on wide-open airflow channels and large wicking ports to feed high-VG e-liquid to low-resistance coils—typically ranging from 0.15 Ω to 0.5 Ω. Most tanks hold 2–8 mL of e-liquid (TPD-compliant versions in Australia are limited to 2 mL) and connect via a standard Thread“>510 thread. Coil materials include Kanthal A1, stainless steel, or mesh strips for faster ramp-up. Glass or reinforced PCTG tubes resist heat, while top-fill or slide-fill mechanisms reduce spills. Variations include top-airflow designs to minimise leaking, mesh sub-ohm coils for even heating, and RTA decks that convert the tank into a rebuildable when the user outgrows pre-made coils.

Usage & Tips

• Priming: Before first use, drip e-liquid onto the coil’s cotton and let the tank sit for 5–10 minutes to avoid dry hits.
• Wattage Range”>Wattage Range: Stay within the coil’s printed range (e.g., 60–80 W) to balance flavour and coil life.
• E-Liquid Ratio: Use 70–80 % VG juice for best wicking; high-PG liquids may leak.
• Common Issues:Gurgling usually means flooding—blow gently through the Tip“>drip tip onto a tissue. Spitback can be fixed by increasing wattage 5 W or closing airflow slightly.
• Safety: Ensure your mod has short circuit protection and can deliver sufficient amperage. Replace cotton or the entire coil once flavour drops or you notice browning.

History & Context

Sub-ohm tanks emerged around 2014 when manufacturers like Aspire and Kanger released the first low-resistance, stock-coil clearomisers. They quickly evolved from 0.5 Ω single coils to today’s 0.15 Ω mesh monsters, bridging the gap between mouth-to-lung starter kits and high-end squonk mods. In Australia, they remain the most popular choice for cloud-chasing enthusiasts who want convenience without steeping into coil-building.