Philip Morris spent the last quarter doing what category leaders do when they own a market: they moved the price and the feature line again. The IQOS ILUMA i family is now the default recommendation in most markets, the TEREA stick range keeps expanding, and the flagship is being pushed further upmarket with things like the limited-run ILUMA i PRIME in Japan. If you sell heat-not-burn hardware, or you are choosing the device you will actually carry for the next two years, this is the moment to re-run the comparison.
This article walks through what the current IQOS ILUMA i lineup actually changes, and where a well-designed alternative — including the HEATX hybrid-heating range — ends up on the same scorecard.
What the IQOS ILUMA i Actually Changed
The ILUMA platform's real breakthrough was removing the heating blade. Instead of a metal blade pushed into the tobacco, the ILUMA uses the SMARTCORE induction system: the stick contains a metal element that heats from within when placed in the device. No blade means no residue and no cleaning routine, which is genuinely a step change for daily users.
The "i" generation builds on that with three feature groups:
- A touch screen on the standard ILUMA i and the ILUMA i PRIME — it shows remaining session time, how many sessions are left, and the preheat status.
- FlexPuff — the device checks whether the stick was fully consumed and can add a few extra puffs near the end of a session.
- Pause Mode — you can suspend a session for a few minutes and resume, so a half-finished stick is not wasted when something interrupts you.
Those are sensible, user-focused upgrades. They also come at a price: the touch-screen models sit at the top of the range, and the premium PRIME uses the same core heating technology as the rest of the family.
Where an ILUMA i Leaves Money on the Table
Two things get overlooked in the launch excitement.
First, the heating geometry has not changed. Induction still heats the stick's built-in element, and the temperature profile is fixed by the firmware. You cannot dial the device for a different stick family or a different flavour preference. That is fine if you only ever buy one type of TEREA, and restrictive if your customers do not.
Second, "one stick, one session" is still the default. The extra puffs from FlexPuff are still within the same session. The stick is not re-heatable across two separate sessions. For anyone who costs out a year of use, that is the line item that matters most — and it is exactly where circumferential heating hardware differs.
The Alternative: 360° Heating You Can Reuse
HEATX builds the same category of device around a different heating geometry. Instead of heating the stick from the inside, a patented 360° circular chamber wraps heat around the full circumference of the stick. Heat arrives from every angle at once, so the tobacco mass heats evenly rather than from a single point.
That single design choice produces a different daily economics:
| What it changes | Why it matters |
|---|---|
| Even heating around the stick | Flavour holds from the first draw to the last instead of fading as the core cools |
| Second use of the same stick | A stick already used once can be heated again — two sessions from one stick |
| Fits a range of TEREA-compatible sticks | No need to change device when you change flavour |
That second-use capability is the headline. HEATX GEN 5.0 and the GEN2.0 both let an already-used stick be heated a second time, which roughly halves cost per session compared with a single-use device in the same category. On top of that, the GEN6.0 adds an air-flow heating layer that works alongside the 360° chamber so the tobacco is heated from the inside out.
Spec-by-Spec: ILUMA i vs HEATX GEN 6.0
Here is the honest comparison for buyers who care about numbers rather than brand.
| Specification | Typical ILUMA i (standard) | HEATX GEN 6.0 |
|---|---|---|
| Heating method | Induction (internal element) | Hybrid: 360° circumferential + air-flow |
| Stick reuse | Single session, extra puffs within it | Two sessions from one stick |
| Battery | Holder + charger split | 2600mAh integrated |
| Sticks per charge | ~20 across the holder | 20 sticks per full charge |
| Charge time | Pocket-charging between sticks | ~90 minutes full charge via Type-C |
| Temperature modes | Fixed firmware profile | Two modes, two temperature curves |
| Body | Premium plastic/aluminium mix | Anodised aluminium, matte finish |
| Size | Separate holder and case | 21.5 × 30 × 105 mm, one piece |
Why Heating Geometry Drives Everything Else
It is tempting to compare devices on features — a screen here, a pause button there. But almost every practical difference between two heat-not-burn devices traces back to one engineering decision: where the heat enters the stick and how evenly it spreads.
Induction heats the stick from an element inside it. That is clean and consistent for the single stick family the device is tuned for, but the temperature profile is set at the factory and the stick is consumed in one pass. Circumferential heating wraps the heat around the outside of the stick instead, which distributes the heat across the whole tobacco mass rather than a single internal point.
Three practical consequences follow from that geometry, and they explain most of the gaps in the table above:
- Flavour consistency. Even heating means the aroma compounds release at a similar rate across the session, so the last draw tastes like the first.
- Stick re-use. If the whole stick heats evenly, there is usable tobacco left after the first session — which is what enables a second use.
- Stick tolerance. A heating surface that touches more of the tobacco mass is more forgiving of natural stick-to-stick variation, so a wider range of TEREA-compatible sticks behaves well in the same device.
When you read a spec sheet, look past the marquee feature and ask which of these three the design delivers. That is the honest measure of a heating system.
Heating Time, Session Length and What They Mean
Two numbers quietly shape daily satisfaction: how long the device takes to heat, and how long a full session runs.
A short heat-up is convenient, but if the session is too short the user feels rushed and ends up running two sticks back to back — which erases any saving. A longer session lets one stick be consumed at a relaxed pace. The HEATX GEN 5.0 runs a 270-second session, the GEN2.0 a 240-second session with a 30-second warm-up, and the HEATX-3 a 320-second working time. Those numbers exist to match how people actually use a device, not to win a specification table.
The GEN2.0's screen makes the trade-off visible in a way a fixed device cannot: it shows 16 puffs on the first use and 13 on the second, and counts them in real time. That is the practical difference between "the stick feels finished" and "the device tells you it is finished."
Sizing, Weight and the Pocket Test
The best device is the one you actually carry. A split holder-and-case design is elegant on a table, but it is two objects in a pocket and one more thing to keep charged.
A single-piece device at 64 g, like the GEN 5.0, is small enough to disappear into a shirt pocket. The GEN2.0 takes the same idea in a different shape: 92.5 × 34.8 × 20.6 mm, deliberately narrower than the traditional ~42 mm body so it does not bulge. Both are anodised aluminium in a matte finish, which resists the fingerprints and scratches that make a glossy plastic shell look worn within weeks.
For anyone who has stopped carrying a device because it was awkward, the pocket test is a real selection criterion — not a cosmetic one.
The Practical Verdict
If your priority is the lightest possible maintenance routine and you are happy inside the TEREA ecosystem with a single, fixed heating profile, an ILUMA i does that job well and the ecosystem is the most developed in the category.
If your priority is cost per session, flexibility across stick types, or a one-piece device that does not need a separate carry case, a 360°-plus-air hybrid like the HEATX GEN 6.0 is the more efficient machine — and it reaches roughly half the price of mainstream flagship hardware while doing more with each stick.
Whichever way you lean, the comparison has changed in the last twelve months. Treat the ILUMA i as the benchmark to beat, not the ceiling. See the full range at HEATX products, or talk to our team about wholesale and OEM.
