# Geekvape Z Nano 3 tank, the spec sheet untangled > The Geekvape Z Nano 3 tank checked against the maker's own sheet, from the 2 ml UK version to B series coils, top airflow and changes from the Z Nano 2. Listings for the **Z Nano 3 tank** contradict each other more than they should. One British review puts it at 22 mm wide, a retailer at 28 mm. Some pages quote 5 ml, others 2 ml, and the same review says it will not take MTL coils that Geekvape lists for it. This guide checks each figure against the manufacturer's own sheet and explains what it changes when you choose a coil or a mod. ## The Z Nano 3 tank in brief, as Geekvape describes it The **Z Nano 3 tank** is a 28 mm wide Geekvape atomiser, the third model in the Z Nano line (the Z stands for Zeus, a name some shops still use). It runs on the brand's B series coils and leaves the box set up for direct lung vaping, with a B 0.2 ohm Boost coil fitted and a B 0.4 ohm Boost coil as a spare. | Detail | Figure | Source | |---|---|---| | Width and height | 28 mm and 57.25 mm | Geekvape | | Weight | 70 g | Two matching retailers | | Capacity | 5 ml, TPD version 2 ml | Geekvape | | Airflow | Top, adjustable | Geekvape | | Filling | Top fill, push to open cap | Geekvape | | Mouthpiece | 510 drip tip, wider spare included | Geekvape | The box also holds a coil tool and a user manual, according to the manufacturer. ## The figures listings disagree on, settled one by one Four discrepancies keep coming back from one listing to the next. The manufacturer's sheet settles each of them, provided you read it rather than a copy of a copy. ### 22 mm or 28 mm wide Geekvape gives a width of 28 mm, and so do most retailers. A British review describes it as a 22 mm tank, and some shops quote a base diameter of 22 or 24 mm. None of those smaller figures appears on the manufacturer's sheet, so 28 mm is the number to hold against your mod. ### A 0.4 ohm coil rated to 35 W or to 45 W Geekvape rates the spare coil at 25 to 35 W. One review stretches that to 45 W. Running a coil 10 W above its stated ceiling dries the wick faster and shortens its life, so the manufacturer's range is the one to follow. ### Will it take MTL coils Yes. Geekvape places MTL versions at 0.6, 0.8 and 1.2 ohm inside the same B series it lists as compatible with this tank, and several retailers sell them for it. The coils in the box, a 0.2 and a 0.4 ohm Boost, are what make it a direct lung tank out of the packet, not a limit of the hardware. ### One drip tip or two One mouthpiece comes fitted and Geekvape adds a second, with a wider bore, in the box. Listings that count two drip tips and those that mention a single spare are describing the same contents. ## Which coil suits the Z Nano 3 tank, value by value The B series runs to eight references in the manufacturer's catalogue, and they fit the Z Nano 2 as well. The table sets out the wattage range Geekvape publishes for each one. | Coil | Version | Recommended range | |---|---|---| | 0.15 ohm | Boost | 60 to 75 W | | 0.2 ohm | Boost, fitted | 50 to 58 W | | 0.3 ohm | Boost | 30 to 38 W | | 0.4 ohm | Boost, spare | 25 to 35 W | | 0.6 ohm | Boost | 15 to 25 W | | 0.6 ohm | MTL | 15 to 25 W | | 0.8 ohm | MTL | 12 to 16 W | | 1.2 ohm | MTL | 8 to 12 W | Staying inside the range matters as much as choosing the value. Below it the vapour stays lukewarm and the flavour flat, above it the wick dries out and a burnt taste arrives. Below 0.4 ohm, check that your mod can actually deliver the power asked for. To get to know this tank, we would start on the 0.4 ohm spare rather than the fitted 0.2 ohm, because it works between 25 and 35 W instead of 50 to 58 W and forgives a rough setting far better. How resistance, wattage and draw fit together is covered in our guide to [coil ohms and wattage](/uk/vape-coil-ohms-and-watts/). ## Setting the top airflow, from MTL to direct lung Air enters through an adjustable ring at the top of the tank. Geekvape presents this as a gain in flavour and in reliability against leaks, since the air inlets sit well away from the liquid instead of opening at the foot of the atomiser. The setting follows the coil. With the 0.2 ohm, open the ring wide, otherwise the vapour runs hot and dense. With a 0.8 or 1.2 ohm MTL coil, close it down to tighten the draw. Our guide to [MTL and DTL vaping](/uk/mtl-and-dtl-vaping/) sets out the settings that suit each style, coil and e-liquid included. ## The 2 ml UK version of the Z Nano 3 tank Geekvape quotes 5 ml for this tank and confirms a TPD version limited to 2 ml. British retailers who publish the specification properly list the 2 ml version, yet some listings aimed at UK buyers still carry the 5 ml international figure. The rule here is plain. Under regulation 36 of the Tobacco and Related Products Regulations 2016, the tank of a refillable electronic cigarette must not exceed 2 ml, nicotine refill containers are capped at 10 ml and nicotine strength at 20 mg/ml. A 5 ml listing is therefore describing the international version, not the one that can be sold legally in the United Kingdom. In practice, the 2 ml glass means refilling two and a half times as often as the 5 ml figure suggests. Keep that in mind before comparing it with an overseas review written around the larger glass. ## First fill and priming without leaks Geekvape presents its push to refill system as new on this model. Press the top cap, it swings open while staying attached to the tank, and the liquid goes in from the top with nothing to unscrew. Then let a fresh coil soak for around ten minutes before the first draw, and start at the bottom of its wattage range. A tank that still weeps may have a misaligned seal or a coil not pushed fully home, and our guide on a [vape tank leaking](/uk/vape-tank-leaking/) helps pin down the zone at fault. ## Z Nano 3 or Z Nano 2, what actually changes Both tanks share the B series coils, so the coils you already own move across with you. The real difference is size. The Z Nano 2 is 22 mm wide and holds 3.5 ml in its international form, against 28 mm and 5 ml for the newer tank, and both exist in 2 ml versions. On a 22 mm mod the older tank sits flush, while the newer one overhangs by 3 mm on each side. Box contents differ too, a 0.2 and a 0.6 ohm coil with the Z Nano 2, a 0.2 and a 0.4 ohm Boost with its successor. Our verdict is clear. On a 22 mm mod, there is no reason to retire a Z Nano 2 in good condition. For a first purchase on a wider device, the newer tank is the more coherent choice in the range. ## FAQ These five answers cover points that retail listings rarely address. ### Which mods suit the Z Nano 3 tank? Any mod with a 510 connection that can deliver the power of the chosen coil, which means up to 58 W with the fitted 0.2 ohm. A mod at least 28 mm wide avoids any overhang. ### Can the glass be replaced? Yes. The glass tube lifts out, and Geekvape supplies a spare in the box, so a scratched or cracked tube does not condemn the whole tank. ### Which colours does Geekvape offer? Four finishes appear in the manufacturer's catalogue, black, silver, blue and rainbow, an iridescent multicolour finish. ### Which e-liquid suits a low resistance coil? Retailers suggest a PG/VG ratio between 50/50 and 30/70, with more vegetable glycerine as the resistance drops. A thin liquid can flood a 0.2 ohm coil. ### Do B coils fit other Geekvape hardware? Yes. Geekvape lists them for the Z Nano 2 and the Z Nano MTL as well as the Boost, Aegis Hero and Force cartridges, which is why some listings call them Aegis Boost coils. ## Buying a Z Nano 3 tank with the facts in hand Three checks are enough before ordering. The capacity, which must read 2 ml for a tank sold in the UK. The 28 mm width, to compare with your mod. And the coil, chosen within the B series to match your draw, Boost for direct lung and MTL for a tight draw. The remaining discrepancies come from careless copying, not from the product. Read at the source, the **Z Nano 3 tank** turns out to be simple to understand, and the same method works for any hardware whose listings disagree, starting from the manufacturer before trusting the first shop you find. Editorial content for adult readers only. Nicotine is highly addictive, and nicotine vaping products are not for sale to anyone under 18 in the UK. Guide Clearomiseur is an independent editorial title and this article is not a buying recommendation.