30-Second Verdict
The Celsius wins on score — 7.0 to 6.8 — and it's the one I'd tell most people not to buy. The Calent is £20 cheaper, wins four of the seven categories outright, and lasts more than twice as long between charges. The Celsius wins because triple heating and a ten-year warranty are genuinely worth two-tenths of a point. You get twenty-seven minutes a day to enjoy them.
Auxo Calent: 6.8/10 | £78.00 Auxo Celsius: 7.0/10 | £98.00
Buy the Auxo Calent if: - You want a battery that gets you through a day — ~20 sessions, about sixty minutes of real vaping - You want the slimmest thing in this price bracket: 135g, 25mm thick, genuinely jeans-pocketable - Dry herb is all you use and one button with four presets is all the interface you want - You'd rather have a device that never surprises you than one that occasionally dazzles you
Buy the Auxo Celsius if: - You need speed: 6 seconds from cold to vapour on the 2.0, the fastest heat-up I've tested - You use concentrates as well as flower and don't want a second device for it - You want to taste what conduction plus convection plus infrared actually does at under £100 - A ten-year warranty on a young brand's flagship reads to you as confidence rather than optimism
Quick Specs Face-Off:
| Auxo Calent | Auxo Celsius | |
|---|---|---|
| Heating | Conduction + infrared | Conduction + convection + infrared |
| Heat-up | ~20–30 seconds | ~6–30 seconds (2.0) |
| Battery | 2900mAh sealed, ~20 sessions / ~60 min | 1100mAh sealed, 9 sessions / 27 min |
| Weight | ~135g (106 × 45 × 25mm) | ~157.8g (114.1 × 45.1 × 33.3mm) |
| Concentrates | No | Yes (swap chamber, 0.05g) |
| Warranty | 2 years | 10 years device / 2 years cable |
| Price | £78.00 | £98.00 |
The Hook
Every family bakery ends up with the same argument, and it's always between two people who learned to bake in the same room.
One of them takes the bread ovens. Up at four, same flour, same tins, the same six hundred loaves the town has bought every week since their nan ran the counter. Nobody photographs a bloomer. But the bread pays the rates, pays the van, pays the other one's wages, and the shop opens at six because the bread is already in.
The other one goes off and learns pastry. Comes back with a laminated dough, a blowtorch and a counter by the window that stops people mid-pavement. Croissants that shatter. A Paris-Brest that takes four hours and sells eleven of. Genuinely better than anything else in town — for about ninety minutes on a Saturday, and then the case is empty and the bread carries the rest of the day.
The Auxo Calent is the bread ovens. The Auxo Celsius is the pastry counter. Same kitchen, same surname, completely different idea of what a shop is for.
I called the Calent the Costa Coffee of vaporisers in its review, and the Celsius got the Ring doorbell treatment in its own — Tom's Ring doorbell, a story that ends in a drawer. Set both aside. What matters here is that these two came out of the same building with the same house style: the same sandblasted aluminium, the same 360° zirconia mouthpiece, the same fixed three-minute session, and — this is the family bit — the same broken app. Google Play, 2.8 stars, both of them. They inherited the same van and it doesn't start for either of them.
One of them scores higher. It's the pastry. Here's why I'd still buy the bread.
We stock both at HerbVape.co.uk — details and pricing below.
Vapour Quality
Both reviews landed on 7.5/10, and for once the identical number hides two genuinely different machines rather than papering over a fudge.
The Celsius has the better heating system and it isn't arguable. Conduction through the steel walls, convection pushing hot air through, infrared adding radiant energy deeper into the material — not marketing waffle, and the evidence is in the ABV. At 180°C through the zirconia the terp preservation is better than anything else I've had at this money. Then the airflow ruins it: those tiny square perforations restrict density to the point where its own review compared it to breathing through a coffee stirrer. You get the flavour. You don't get the cloud.
The Calent has the worse heater and the better draw. Conduction with an infrared assist means the first two or three draws at 180°C punch above £78 — limonene lifts, the zirconia keeps it smooth — and then, by draw four, conduction does what conduction does and you're extracting cannabinoids without tasting much. The infrared buys a draw or two of extra flavour window; it doesn't rewrite the physics. What it does have is open, natural airflow — its review called it breathing rather than sucking through a straw, and that's the difference you feel in your chest.
Better extraction: Celsius. Better draw: Calent. Same score, and both of them earned it. The honest summary is that the Celsius gives you a better-tasting smaller mouthful and the Calent gives you a bigger, blander one — and if you're at 220°C on the Calent, note the zirconia can't keep up and your throat will tell you. Stay at 200 and below.
The Strain Test, Side by Side
Straight to the caveat, because it matters: neither of these reviews ran the site control. No Jack Herer, no Wedding Cake. The Calent was tested on Banana Kush and Noidecs T17 Red No.2; the Celsius on Slurricane and Adven EMT-3 Cali. Two different pairs of jars, so this is a comparison of behaviour rather than a like-for-like read of the same terps, and I'd rather say that out loud than pretend otherwise. What I can do is line up street strain against street strain and medical against medical.
The street strain. The Calent got Banana Kush — 18–22% THC, myrcene-limonene, one of the most forgiving profiles you can hand a conduction device, and its review said so plainly: the terps survive even when the heating method isn't optimal. At 180°C, proper banana sweetness, three smooth creamy draws, the zirconia holding the light top notes; at 200°C the caryophyllene turns up and the flavour is gone by draw four. Classic. The Celsius got Slurricane — 24–28% THC, dense, frosty, resin packed tight, chosen precisely because it tests extraction efficiency. At 175°C: grape candy straight away, no hot spots, no flavour spikes. At 195°C the diesel arrives, four draws, each concentrated but thin because of that airflow. At 215°C the ABV comes out evenly brown right across the chamber, which is the triple heating's actual party trick. The Calent was given the easy jar and did adequately; the Celsius was given the hard jar and did well — one tested on the loaf, the other on the laminated dough, and the results still went the way the ovens say they should. Note also which review had to record a battery percentage mid-strain-test: the Celsius's third session started at 60%, and at 215°C you get six sessions from a charge, not nine.
The medical strain. Both reviews reached for a budget clinic staple at roughly £5–6/g, which is the honest test for anyone holding a prescription. The Calent ran Noidecs T17 Red No.2 — 17% THC, myrcene-forward, earthy, herbal. Straightforward opening at 185°C, two moderate draws, relief arriving in that slow spreading way; caryophyllene warmth at 200°C; done by 210°C. Its verdict: Red No.2 doesn't demand excellence from the hardware and the Calent is competent. The Celsius ran Adven EMT-3 Cali at half a bowl, 0.2g, specifically testing micro-dosing, and this is where its case is strongest — at 170°C you're drawing citrus terps within ten seconds of pressing the button, and for someone whose pain has just spiked, ten seconds versus half a minute isn't a spec-sheet difference. Half bowls also stretch the battery to six or seven sessions. The Calent is the better medical device for a whole day; the Celsius is the better medical device for the worst two minutes of one.
The call: on extraction quality, the Celsius, on the harder flower, with the more even ABV. On the amount of flower you'll actually put through it before something stops you, the Calent, by roughly a factor of two. The pastry is better. There's less of it, and then it's gone.
Design & Build
Both scored 8.0/10, from the same design language, with the same asterisk waiting at the bottom of each.
The Calent is the prettier object: sandblasted aluminium that shrugs off fingerprints, 135g, 25mm thin, no rattles, a magnetic mouthpiece that clicks properly. Its review reckoned that on design alone it would score an 8.5. What drags it back are documented heater failures at three months — units cycling on and off producing no heat — against a two-year warranty and customer service described as considerable hassle.
The Celsius is heavier at 157.8g and better engineered where it counts: well-machined steel oven, chambers that swap cleanly, no flex. Its asterisk is thermal. Aluminium was chosen for feel and conductivity, and conductivity works both ways — two sessions back to back and it's uncomfortable, three and you're shifting your grip waiting for it to cool. The mouthpiece rotation point is showing scuff marks earlier than it should. Against that: ten years of warranty, and one reported replacement turned round in weeks.
Winner: draw on score; Celsius on paperwork, Calent in the hand. One is a nicer thing to carry. The other is a better thing to still own in 2031, assuming Auxo are still answering the phone.
Battery & Charging
Winner: Auxo Calent, and it isn't a contest. 8.0/10 versus 4.0/10 — the widest gap on the card and the reason this comparison exists.
The Calent's 2900mAh gives roughly 20 sessions, about sixty minutes of real vaping. You can leave the house without a plan. USB-C at sensible rates, and the only caveat is that it's sealed, so when capacity fades in 18–24 months there's no cell to swap.
The Celsius has 1100mAh in a 158-gram device. Nine three-minute sessions. Twenty-seven minutes. Then 90–120 minutes on the cable to get those twenty-seven minutes back — a ratio you wouldn't accept from an electric toothbrush. Its review stopped being diplomatic at exactly this point and I won't re-open the argument, only note the arithmetic: the cheaper sibling has nearly triple the capacity in a lighter body. Same family, same year, same brief. Somebody made a choice.
Ease of Use
Winner: Auxo Calent. 7.5/10 versus 7.0/10.
Strip the app off both and they're nearly the same device: four presets, one button, load and press. The Calent gets there in 20–30 seconds; the Celsius in as little as six. Both then stop dead at 180 seconds whether you'd finished or not, and neither will extend without the app — and the app, for both of them identically, is the family failing. Bluetooth that won't pair, crashes after firmware updates, Pro Mode settings that reset themselves, 2.8 stars on Google Play. Buy either assuming the app does not exist and you'll be content.
The Calent takes the category on two smaller things. It passed the mum test, barely — pick a preset, wait, go, with the one warning that somebody has to tell her it shuts off after three minutes or she'll bring it back thinking it's broken. The Celsius failed outright: app dependency, two chambers to choose between, a timer running while you're still finding your glasses. The Calent's own trap is grind rather than software — medium-coarse only, or the airflow dies and you're cleaning screens every three to five sessions instead of five to seven. If you're new to this, the temperature guide is worth ten minutes before your first bowl in either.
Cleaning & Maintenance
Winner: Auxo Celsius, narrowly. 7.5/10 versus 7.0/10, and the reason is one the Celsius didn't earn so much as avoid.
Both are stainless oven, zirconia path, standard ISO-and-brush, both wanting care around the magnetic joint on the rotating mouthpiece — don't soak the contacts. The Celsius actually adds work if you use the concentrate chamber, since wax wants a longer soak than dry ABV. It still wins, because the Calent's grind sensitivity turns cleaning into a variable rather than a schedule. Neither is difficult, and if you've ever stripped a cooling unit you'll find both restful.
Portability
Winner: Auxo Calent. 8.5/10 versus 7.0/10.
The Calent wins on dimensions — 135g, 25mm thin, slimmer than a PAX Plus, lighter than an ArGo — and wins again on two things the tape measure doesn't show: it doesn't get too hot to put away, and its battery means you're not carrying a cable. Stealth is genuinely high; it reads as a power bank to anyone not looking hard.
The Celsius is fine on paper at 157.8g and comfortable in a jacket pocket, but you can't pocket it for five to ten minutes after a session because the aluminium is still shedding heat into your hand, and twenty-seven minutes makes portability theoretical anyway. Its own review put it best: the ten-year warranty suggests a long-term device, the battery suggests it won't travel far from a USB-C cable.
Value for Money
Winner: Auxo Calent — 6.5/10 to 6.0/10 — and neither of these is a bargain.
At £78 the Calent is affordable and the XMAX V3 Pro is £79.99 with hybrid heating, a removable 18650, session and on-demand modes and a far bigger community. That's the whole value problem, and the Calent's review named it: no-man's land pricing. What £78 does buy uncontested is the slimmest thing under £100.
At £98 the Celsius is a different proposition — genuinely novel technology at budget money, plus a decade of cover. Its review framed it right: a tech showcase you can afford to gamble on, provided you understand the battery is the trade. But 6.0 against 6.5 tells you which the maths preferred, and the £20 runs the same direction. How I arrive at these numbers is on the methodology page.
Score Comparison
| Category | Auxo Calent | Auxo Celsius |
|---|---|---|
| Vapour Quality | 7.5/10 | 7.5/10 |
| Design & Build | 8.0/10 | 8.0/10 |
| Battery & Charging | 8.0/10 | 4.0/10 |
| Ease of Use | 7.5/10 | 7.0/10 |
| Cleaning & Maintenance | 7.0/10 | 7.5/10 |
| Portability | 8.5/10 | 7.0/10 |
| Value for Money | 6.5/10 | 6.0/10 |
| Overall | 6.8/10 | 7.0/10 |
Read that honestly and it's an odd table: the Calent wins four categories, draws two, loses one — and still finishes two-tenths behind. Those are the overalls each review published and I'm not adjusting them after the fact, but you're owed the explanation. The Celsius's number rewards a ceiling, not a floor: triple heating that demonstrably extracts more evenly, six-second onset, concentrates, a decade of cover. The Calent's card is the shape of a device that will annoy you less.
Who Should Buy Which
Buy the Auxo Calent if you want the one that opens the shop every morning. All-day battery, jeans-pocket portability, one button, and a device that will never be the reason your evening stopped. It's the right answer for a design-conscious beginner, for a medical user on budget flower who needs it working at 9am and again at 9pm, and for anyone who read the Celsius's battery section and felt their jaw tighten. Grind medium-coarse, stay under 200°C, done.
Buy the Auxo Celsius if the ninety minutes on Saturday are the point. You want the fastest onset available for acute pain, you use concentrates as well as flower, you're curious enough about triple heating to pay £98 to hear it, and you're realistic about a device that gives you twenty-seven minutes at a go. Half-bowls at moderate temperatures stretch that to six or seven sessions — a real strategy rather than a consolation.
The wrong buyer for the Calent is anyone who already knows what a V3 Pro is — its own review admits the Calent lives in that device's shadow at two quid less. The wrong buyer for the Celsius is anyone who wants a daily driver, a group device, or an evening. It doesn't have the energy for any of those, literally.
How I Actually Choose
I don't reach for either, and the rotation data says so, because I keep rotation data, because ADHD.
The Calent is in a drawer. Not broken, not resented — I lent it to a mate who used it for two months, said "yeah it's alright," borrowed the V3 Pro instead and never asked for the Calent back. The Celsius lives on the bedside table next to a USB-C cable, permanently charging, occasionally brilliant: when pain spikes and I want cannabinoids in ten seconds rather than sixty, nothing else I own is close. Three weeks as my emergency device earned it that spot and nothing more.
Tom, who owns the Celsius and whose Ring doorbell supplied that review's entire framing, worked out the family angle before I did. He asked whether he should get the Calent as well — "then between the two of them I've got a full day, haven't I." That is not how batteries work. It is, annoyingly, roughly how his shelf now works: the Celsius for the first ten seconds of a bad afternoon, the Calent for the other fifty-nine minutes. £176 to assemble one competent vaporiser out of two half-competent ones is not advice I'd give anybody. He seems pleased.
Neither of these is in my rotation. Both make sense to somebody who isn't me.
The Verdict (The Bookend)
The pastry counter wins every prize the town has to give, and the bread is why the shop is still open.
The Auxo Celsius takes it 7.0 to 6.8 on genuine merit: better extraction on harder flower, six seconds from cold, concentrates included, ten years of warranty behind it. Every one of those is real. But it wins on a ceiling you get twenty-seven minutes a day to stand under, and it costs £20 more for the privilege.
The Auxo Calent loses by two-tenths while winning battery, ease of use, portability and value — four categories to one — and it's the one I'd put in most people's hands. All-day power, jeans-pocketable, one button, nothing about it that will ruin an afternoon. Its own review called it forgettable as description rather than insult, and forgettable is exactly what a first vaporiser should be.
Both inherited the same broken app, the same three-minute timer and the same sealed battery, which is what happens when two siblings train in one kitchen. Buy the Celsius for the moments. Buy the Calent for the days. And if you already know the V3 Pro exists at £79.99, both reviews have told you it's the better machine, and neither of them enjoyed writing it.
Just one more bowl. If the battery allows it.
FAQ
Auxo Calent vs Auxo Celsius — which should I buy? The Calent for nearly everyone: £20 less (£78 vs £98), nearly triple the battery, slimmer, simpler, and it wins four of seven categories. Buy the Celsius only if six-second onset or concentrate compatibility is specifically what you're paying for — it does score higher overall (7.0 vs 6.8) on the strength of those.
Why does the Celsius score higher if the Calent wins more categories? Because its overall rewards what the device does at its best — triple heating that extracts more evenly on dense flower, the fastest heat-up I've tested, dual-use chambers, ten-year cover. The Calent's card is the shape of a device that inconveniences you less. Both numbers are the canonical review scores and I'm not massaging either.
Which battery is actually usable? Only the Calent's: 2900mAh, about 20 sessions, roughly sixty minutes. The Celsius has 1100mAh — nine three-minute sessions, twenty-seven minutes, and 90–120 minutes on the cable to refill it, dropping to six or seven sessions at high temperatures. Both sealed, so neither can be revived with a new cell.
Does the app work on either? No. Same app, same 2.8-star rating, same pairing failures and post-update crashes on both. Treat the four presets as the whole interface and you'll be content; buy either for Pro Mode and you'll be disappointed twice.
Can either handle concentrates? Only the Celsius, via a swappable 0.05g chamber — competent for occasional wax, not a dab rig replacement. The Calent is dry herb only, which is one less thing to clean.
Which grind should I use? Medium-coarse in the Calent, non-negotiable — fine grind chokes the airflow and doubles your screen cleaning. The Celsius is more relaxed at a medium grind. Both take about 0.3g, and half-bowls in the Celsius are the smart move for battery reasons.
Is the Celsius's ten-year warranty worth the extra £20 on its own? Only if you believe it'll be honoured in year eight, which nobody can promise about a young brand. Current reports are good — one replacement inside weeks. The Calent's two years is ordinary, and given documented heater failures at three months, ordinary may be the more relevant number.
About Dennis M.
Dennis M. has been reviewing vaporisers and vaping daily for the best part of a decade. He works in IT, has ADHD, and uses cannabis for chronic pain management. He lives in Manchester with his partner Sarah, who has observed that owning two devices from the same brand that each solve the other one's problem is "not a collection, it's a hostage situation."
Dennis's nan worked in a bakery for eleven years and maintained that anyone who could not get the bread right had no business touching the pastry. He has thought about that sentence a great deal while writing this comparison.
A note on spelling: 'vaporizer' is the de facto international spelling, but I've stuck with the British 'vaporiser' throughout this blog.
Questions, corrections, or a device you want tested? dennis@herbvape.co.uk
Related Content
Full Reviews: - Auxo Calent Review: The Costa Coffee of Vaporisers → - Auxo Celsius Review: The Ring Doorbell Camera →
More Comparisons: - All head-to-heads →
New to Vaping? - The Temperature Guide → - How I score devices →
Get Either at HerbVape.co.uk {#shop}
Auxo Calent — £78.00 Buy the Auxo Calent → Worth grabbing with it: a four-piece grinder that gives you a proper medium-coarse — the Calent's airflow depends on it more than the manual admits.
Auxo Celsius — £98.00 Buy the Auxo Celsius → Worth grabbing with it: a spare USB-C cable. With this battery, that isn't an upsell, it's infrastructure.
Just one more bowl.
Review Policy: I buy or borrow the devices I review. HerbVape.co.uk is my employer, but my opinions are my own — they pay me to be honest, not to sell you shite. Affiliate links and discount codes exist because running a site costs money, not because they influence scores.
Strains Used: this pairing is the exception on the site — neither review ran the standard Jack Herer and Wedding Cake control. Calent: Banana Kush (indica hybrid, ~18–22% THC, myrcene/limonene/caryophyllene/linalool) and Noidecs T17 Red No.2 (indica, medical, ~17% THC, myrcene/caryophyllene/limonene). Celsius: Slurricane (indica, ~24–28% THC, limonene/caryophyllene/myrcene/linalool) and Adven EMT-3 Cali (sativa, medical, ~20% THC, myrcene/limonene/pinene). Comparisons above are of device behaviour on comparable strain types, not of identical flower. Strain effects vary by individual, batch and consumption method.
Medical & Legal Disclaimer: Nothing in this comparison constitutes medical advice, and I am not a medical professional. Cannabis is a controlled substance in the UK; medical cannabis is legal only on prescription from a registered specialist clinic. HerbVape.co.uk sells vaporiser hardware only: we do not sell, prescribe, or recommend cannabis or cannabis products. Vaporisers are sold for use with legal dry herbs and legally prescribed medical cannabis. You must be 18 or over to buy one, and cannabis law varies by jurisdiction — check yours.
Last updated: 26 August 2026.