What Is A Vape Coil?
A clear UK guide to vape coils, the heating elements that turn e-liquid into vapour and how to choose the right type.
A vape coil is the heating element that vaporises e-liquid in your device.
Each coil contains a metal wire wrapped in cotton wicking. Battery power heats the wire which vaporises e-liquid soaked into the cotton. Coils need replacing every 1 to 3 weeks depending on use. Resistance measured in ohms determines power requirements and vape style.
Coils are the wear part of any vape. They burn out, get clogged and eventually need replacing. Understanding what coils do and how to look after them saves money on early replacements and stops most flavour problems before they start.
How vape coils work
Four components combine to make any vape coil function. The grid below covers each.
Heating wire
Coiled metal wire that heats up when current passes through. Most UK coils use kanthal or stainless steel.
✓ Core componentCotton wick
Cotton material that absorbs e-liquid and feeds it to the wire. Quality affects flavour and lifespan.
✓ Critical partCoil housing
Metal casing that holds wire and cotton in place inside your tank or pod.
✓ StructureResistance
Measured in ohms. Lower ohms means more power and vapour. Higher ohms means cooler and discreet.
✓ Vape styleCommon UK coil types
The table below covers the main coil categories you will see in UK vape shops.
| Coil type | Best for |
|---|---|
| 1.0-2.0 ohm MTL coils | Pod systems and mouth to lung devices, low power |
| 0.6-0.8 ohm restricted DTL | Hybrid devices, moderate cloud production |
| 0.15-0.5 ohm sub ohm coils | DTL sub ohm tanks, large clouds |
| Mesh coils | Newer design, longer life and better flavour at any resistance |
| Replaceable wire and cotton | RBA setups for advanced users who build their own coils |
What kills a coil prematurely
Three factors shorten coil life dramatically. Vaping at higher wattage than the coil is rated for scorches the cotton. Sweet flavoured e-liquid leaves residue that builds up over time and reduces flavour. Skipping the priming step before first use burns the cotton instantly. Most UK vapers find getting these three things right doubles or triples coil lifespan.
UK coils almost always have the recommended wattage range printed on the side or packaging. Operating outside this range either burns the coil if too high or produces poor vapour if too low. Pod system coils typically have fixed wattage controlled by the device. Sub ohm coils require manual wattage matching on adjustable mods.
How to make coils last longer
The checklist below covers what UK vape shop staff most often recommend.
Coil lifespan checklist
Use four or more of these to extend coil life.
- Prime new coils properly before first use
- Stay within the recommended wattage range
- Avoid heavy sweet flavours that build residue
- Let the device rest 30 seconds between long puffs
- Keep tank or pod topped up to prevent dry burns
- Replace coils as soon as flavour fades, do not push past it
Signs your coil needs replacing
Three signs indicate end of coil life. Burnt or muted flavour despite fresh e-liquid means cotton is degraded. Reduced vapour production at the same wattage means coil resistance has changed. Visible residue or discolouration on the cotton when inspecting confirms the coil should be replaced. Most UK vapers find their coils last 1 to 3 weeks depending on use intensity and e-liquid type.
Coils need proper care from the first install, which our our guide on how to prime a vape coil explain in detail, plus our article on why your vape tastes burnt covers wattage selection that affects coil performance.
Frequently asked questions
How long does a vape coil last?
Typically 1 to 3 weeks depending on use, e-liquid and wattage.
Why does my new coil taste burnt?
Almost always insufficient priming or first firing too hot. Both ruin the coil quickly.
What is mesh coil?
Newer coil design using mesh sheet instead of wound wire. Generally better flavour and longer life.
Can I clean and reuse a coil?
Cleaning extends life slightly but the cotton degrades regardless. Replacement is the standard solution.
Why do my coils burn out so fast?
Sweet flavours, high wattage and skipped priming are the three main causes.
Part of our Consumer Guides Hub
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Our consumer guides hub explains coils, batteries, e-liquid types, troubleshooting and everything else you need to know as a UK vaper.
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