Extreme Sub-Ohm – What is it in Vaping?

Definition

Extreme Sub-Ohm refers to vaping with coil resistances below 0.1 Ω (ohms) in rebuildable atomisers or tanks. Designed for advanced vapers chasing maximum vapour production and intense flavour, this practice pushes high-discharge batteries to their limits. By drastically lowering resistance, more current flows through the coil, instantly vaporising copious amounts of E-Liquid and creating dense clouds. Because power demands sky-rocket (often 100 W–300 W), Extreme Sub-Ohm setups require specialist knowledge of Battery Safety”>battery safety, Ohm’s Law, and heat management. It is not recommended for beginners using standard eGo Style pens or casual E-Cigarette devices.

Technical Details

Extreme Sub-Ohm builds use thick, low-resistance wire—commonly dual, triple, or quad coils of 20–24 GA Kanthal, NiChrome, or stainless steel—mounted on large postless decks. Target resistances range from 0.03 Ω to 0.09 Ω, demanding continuous discharge ratings of 35 A or higher from 20700/21700 or high-amp 18650 cells. Vapers typically select high-VG (80%+) E-Juice to wick efficiently at 150 W-plus and avoid dry hits. Airflow is maximised through wide-bore 810 drip tips and adjustable slots, cooling the assembly. Variations include framed staples, staggered coils, and mesh strips, each offering different ramp-up speeds and surface area for vaporisation.

Usage & Tips

• Battery safety first: Only use married, authentic cells with clearly rated 35 A+ continuous discharge; inspect wraps for nicks before every use.
• Ohm’s Law check: Verify resistance on a Mod“>regulated mod or ohm reader; aim for amp draw ≤80% of battery CDR to leave headroom.
• Wicking: Use generous Scottish-roll cotton for high-VG juice, thinning tails slightly to prevent choking in massive coil ports.
• Common issues: Hot legs—fix by tightening grub screws and pulsing evenly; spit-back—raise wattage 5–10 W or increase airflow.
• Stay hydrated: Extreme Sub-Ohm produces large clouds that can dehydrate; keep water handy and vape in well-ventilated areas.

History & Context

Sub-ohm vaping emerged around 2012 when rebuildable dripping atomisers (RDAs) hit the hobbyist scene. As battery technology improved, cloud-chasing competitions pushed resistances ever lower, birthing “Extreme Sub-Ohm” by 2015. Australian vapers joined global contests like VC Cloud Championships, popularising 0.05 Ω builds and driving innovation in high-amp cells, temperature control, and mesh platforms. Today, mainstream manufacturers offer regulated 300 W mods and safety-centric tanks, making Extreme Sub-Ohm more accessible—yet it remains a niche for experienced enthusiasts rather than everyday E-Shisha users.