Vaporizer: what it is and how it differs from an e-cigarette

A vaporizer is a device that heats dry plant material enough to evaporate active substances. However, it heats weakly enough to prevent the material from igniting. This difference can be measured: in vapor from the Volcano device, the ratio of cannabinoids to by-products at 200 and 230°C was higher than in smoke from a hemp cigarette (Pomahacova et al., Inhalation Toxicology, 2009). However, under one name there are two different devices. One heats dry herb, the other heats ready-made liquid, which in practice is an e-cigarette. This text concerns the first. It explains what vaporization is and how it differs from smoking, the types of devices, and what is legally allowed to be vaporized in Poland. At the end, you will find what research says about harm and what remains unresolved.

KEY INFORMATION
• Vaporizer heats dry herb without combustion; in electric devices THC decarboxylation was at least 97.3% (Lanz et al., PLOS ONE, 2016).
• Dry herb vaporizer is not an e-cigarette, which evaporates ready-made liquid from a cartridge.
• The EVALI lung injury wave was linked to liquids with vitamin E acetate, not dry herb.
• Legal hemp dry herb in Poland is the sum of delta-9-THC and THCA up to 0.3% dry weight.

What is a vaporizer?

A vaporizer is a heating device that brings dry plant material to a temperature at which cannabinoids and essential oils turn into vapor. The plant itself does not ignite. Instead of smoke, an aerosol is produced. In laboratory validation of five commercial devices, vapor contained from 54.6 to 82.7% of total THC contained in the dry herb (Lanz et al., PLOS ONE, 2016).

The boundary is combustion. Below the temperature at which the plant starts to burn, heat only evaporates volatile compounds. Above it, decomposition reactions begin, and combustion products appear in the air, which distinguishes smoke from vapor. Therefore, the most important feature of every vaporizer is temperature control. The more stably the device maintains the set value, the lower the risk that dry herb near the chamber wall will start to smolder.

The word comes from English vaporizer, which comes from Latin vapor, meaning vapor. In shops and forums, you will also find the English name and the abbreviation vape, which increasingly means e-cigarette. Therefore, with every device description, check what the device heats: dry herb, liquid, or concentrate.

Vaporizers are used with legal hemp dry herb, including CBD dry herb. They are also used for medical cannabis by prescription and for aromatic herbs. Devices differ in power supply and heating method, but the principle is common. A vaporizer does not burn, it heats. The physics of heat transfer, chamber construction, and differences between heating types are described in a separate text about how a vaporizer works.

What does a vaporizer consist of?

Every vaporizer has a heat source, a chamber for dry herb, and a path through which vapor reaches the mouth. In an electric device, the source is a heating element powered by a battery or mains. In a manual model, the body is heated externally by flame or induction heater. The rest of the construction is similar in all types.

• The heating element heats the chamber walls or the air flowing through it.
• The chamber holds a portion of dry herb; usually one in portable devices, larger in stationary ones.
• The screen retains small particles to prevent them from reaching the mouth.
• The vapor path leads from the chamber to the mouthpiece and gradually accumulates residue.
• The mouthpiece receives vapor in portable devices; in stationary ones, this role is fulfilled by a balloon or hose.
• Electronics with buttons or an app set temperature and working time. Manual models lack electronics.

These parts explain most differences between models. The chamber and vapor path material affect taste. Electronics affect temperature accuracy, and the power source affects portability. Therefore, specifications of these parts are a starting point when choosing a device. Does chamber material matter for a beginner? Less than stable temperature, which decides whether dry herb burns.

What is vaporization and what happens to dry herb in the chamber?

Vaporization is the evaporation of active substances from the plant under heat, without combustion. Decarboxylation also occurs, converting inactive THCA and CBDA acids into active THC and CBD. In electric devices, it was at least 97.3% for THC and at least 94.6% for CBD (Lanz et al., PLOS ONE, 2016).

These two numbers show that controlled heat does two things at once. It activates compounds that in the raw plant mainly occur in acid form and transfers them to vapor.

Not every device does this equally well. In the same study, a gas-powered vaporizer performed decarboxylation less effectively, at least 87.7%. Researchers also observed combustion of material in it. The name on the casing does not guarantee smoke-free vapor. Stable temperature decides whether you really vaporize or slowly burn.

What remains in the chamber after a session? Dry herb changes color from green to brown and loses most aroma. It is called ABV, from English already been vaped. It is not completely devoid of active substances, as none of the tested devices transferred all THC to vapor. Its potency cannot be assessed without laboratory testing. Some people reuse it, but it must always be treated as material of unknown potency.

The word vaporization has other meanings. In physics, it simply means evaporation, and in medicine it appears in procedures where laser evaporates tissue. In the context of cannabis and herbs, it always means heating plant material in a dedicated device.

How does vaporization differ from smoking?

The composition of what reaches the lungs. A team from Leiden compared vapor from the Volcano device with smoke from a hemp cigarette using high-performance liquid chromatography. The ratio of cannabinoids to by-products in vapor at 200 and 230°C was statistically significantly higher than in smoke (Pomahacova et al., Inhalation Toxicology, 2009).

Another proof comes from a clinical study. Eighteen healthy people on a ward underwent a six-day protocol. Each day, one of three dry herb strengths (1.7%, 3.4%, or 6.8% THC) and one of two administration routes: cigarette or vapor from the Volcano device, were randomly assigned. Peak THC plasma concentrations and area under the curve over six hours were comparable for both routes. Carbon monoxide levels in exhaled air were lower after vaporization than smoking. No adverse events were recorded (Abrams et al., Clinical Pharmacology and Therapeutics, 2007).

The conclusion from both studies is clear: vapor delivers comparable THC amounts with fewer combustion products. Carbon monoxide illustrates this well, as it forms during combustion of organic matter, not during evaporation.

What these studies do not say? They do not specify how many percent fewer tar substances a vaporizer user inhales. They also do not say how this difference translates into health over years. Authors describe the direction and statistical significance of the difference. Percentage reductions circulating in guides do not come from these publications. Vaporization’s advantage must be described as cautiously as the researchers do.

The difference also concerns usage method. A joint or pipe burns material in contact with fire, while a vaporizer allows setting and maintaining temperature throughout the session. There is no ember or ash, and after the session, brown dry herb remains instead of burnt residue.

How much active substances really transfer to vapor?

From 54.6 to 82.7% of total THC and from 45.9 to 70.0% of total CBD, depending on the device. This was the recovery in vapor in validation of five commercial vaporizers, measured by gas chromatography coupled with mass spectrometry. Residue in the chamber was measured separately by liquid chromatography (Lanz et al., PLOS ONE, 2016).

The best THC result is half again higher than the weakest: 82.7 versus 54.6%. This difference says more than model ranking. It shows that the question of how much a device delivers from dry herb has no single answer for the whole category. It also does not mean bigger equipment delivers more: the stationary Volcano Medic performed worse than the portable Arizer Solo.

Two notes help read this table fairly. First, older generations of equipment were tested, so this is not a ranking of today’s models. Second, measurement was done on standardized material and a set vapor intake scheme. A home session with your own grinder, different herb moisture, and inhalation speed may yield different results. Treat these values as device capabilities in the lab, not promises.

For the same reason, calculations like “vaporizer pays off after two months” make no sense without specifying model and usage. Herb savings depend on device and technique, which vary more between users than shop descriptions.

How does a dry herb vaporizer differ from an e-cigarette?

By material and what evaporates. A dry herb vaporizer heats shredded plant and releases compounds present in it. An e-cigarette, also called a liquid vaporizer, evaporates a ready-made mixture from a cartridge, usually based on propylene glycol and glycerin with flavorings, sometimes with nicotine or cannabis extract. These are two separate equipment categories despite the common name and similar word vape.

This distinction changes risk assessment. For dry herb, temperature and plant contents, including possible pesticide residues, decide risk. For liquid, the mixture composition decides, over which the user has less control, seeing only the ready cartridge. Therefore, conclusions from e-cigarette studies do not automatically apply to dry herb vaporization, and vice versa.

Where does confusion come from? Both devices have a battery, mouthpiece, and similar shape, and both inhale aerosol. In commerce, the boundary is even more blurred. The word vape describes both e-cigarettes and portable herbal vaporizers. Some devices accept interchangeable inserts for dry herb and concentrates. When buying, the chamber description matters more than the name.

Concentrates, i.e. thick plant extracts, are another material with different dosing and equipment. Their heating is called dabbing. Regulations differ too. E-cigarettes and nicotine liquids have their own regulation in Poland. Dry herb vaporizers are ordinary equipment whose possession requires no permits.

What types of vaporizers are there?

The main division is by power supply. Portable have built-in or replaceable battery and fit in the hand; stationary work from mains and stand on a table. Manual have no battery or electronics and are heated externally. The second division concerns heating method. In conduction, dry herb contacts hot chamber wall; in convection, hot air stream heats it. Hybrid combines both.

Heating type affects warm-up time and how evenly dry herb releases compounds. In conduction, material near the wall heats more than in the chamber center; convection usually needs more start-up time.

Both cited studies comparing vapor with smoke (Pomahacova et al., 2009; Abrams et al., 2007) were done on the stationary Volcano device. This does not mean only such equipment produces clean vapor. In Lanz’s validation, portable electric devices decarboxylated as effectively as stationary ones.

Choosing type is a question of usage style, not quality. Stationary wins with larger chamber and no charging. Portable is available anytime, and manual requires no battery. How to choose type and parameters is described in guide: how to choose a dry herb vaporizer. Compare specific models only after knowing what type you want.

What do the most important vaporization terms mean?

More than a dozen words recur in every manual and device description. Most often you will see setting, i.e. temperature set on the device. It is not the same as dry herb temperature in the chamber. The sensor measures heat near the heating element, and dry herb inside may have a different temperature. Therefore, two devices with the same setting can produce different vapor.

Session or on-demand mode tells more at purchase than heating technology name. It decides daily use. Other terms recur in every manual, including texts about specific models.

What can be legally vaporized in Poland?

Hemp dry herb with sum of delta-9-THC and THCA not exceeding 0.3% dry weight. Also herbs outside narcotic regulations and pharmaceutical raw material from hemp issued by prescription. The threshold comes from art. 4 point 5 of the Act on Counteracting Drug Addiction (consolidated text: Journal of Laws 2023 item 1939). Legality depends on material, not device.

The threshold counts as sum of two compounds: delta-9-THC and tetrahydrocannabinolic acid (THCA). This distinction changes laboratory test results, as raw plant mainly contains acid form. It also makes practical sense, as vaporizer converts THCA to THC anyway. This wording was introduced by the Act of March 24, 2022 (Journal of Laws 2022 item 763), effective May 7, 2022.

The 0.2% value, still appearing in product descriptions and forums, is historical: it applied until May 6, 2022. If a seller cites it today, their description is simply outdated.

Non-fiber hemp is available as pharmaceutical raw material by prescription since November 1, 2017, based on the Act of July 7, 2017 (Journal of Laws 2017 item 1458). Prescription authorizes only the patient it was issued to and does not allow transferring material to others. Vaporization is one administration route, and therapy is decided by a doctor.

The vaporizer itself is ordinary equipment and possession does not violate law. Driving under influence is a crime under art. 178a § 1 of the Penal Code. Driving after use is an offense under art. 87 § 1 of the Code of Offenses. If you vaporize THC-containing dry herb, including legal hemp or prescription material, do not drive. For CBD dry herb, check certificate of analysis showing THC and THCA content.

What herbs and dry herbs are suitable for vaporizer?

Suitable are hemp dry herb within 0.3% THC and THCA threshold, including CBD dry herb. Also suitable are aromatic herbs like lavender or chamomile, which are not subject to narcotic regulations. Vaporizer evaporates everything in the material, so herb quality affects vapor as much as device settings.

Herbs behave differently in the chamber than cannabis flower, due to different essential oil composition and temperature ranges. For each new plant, start at low setting and raise gradually. Dried herbs are in the herbs category.

Before session, check material. Certificate of analysis (COA) shows cannabinoid content, and smell indicates terpene preservation. Material stored too long in warmth and light loses volatile compounds, so vapor is poorer regardless of setting. Over-dried herb crumbles to dust that easily passes through screen, so better restore moisture than raise temperature before session.

Before placing in chamber, grind herb evenly so air and heat pass uniformly. Too fine dust may pass through screen, so medium grind works better than powder. Grinders, including pollen sieve types, are in the grinders category.

What not to put in dry herb vaporizer? CBD oil drops and other liquids, as well as concentrates unless manufacturer provides insert. Oil is for oral use, and liquid spilled in dry herb chamber soils screen and vapor path.

What do studies say about vaporization harm?

They indicate vaporization burdens respiratory tract less than smoking, but evidence is limited. In a large online survey, vaporizer use predicted fewer respiratory symptoms even after adjusting for age, sex, cigarette smoking, and cannabis amount. Effect was greater with more cannabis used (Earleywine and Barnwell, Harm Reduction Journal, 2007).

Another study measured lung function. Twenty heavy cannabis users with at least two respiratory symptoms underwent a month of vaporization in a before-and-after design. In twelve participants without respiratory illness during that time, symptoms and forced vital capacity improved significantly. Forced expiratory volume in one second also increased but without statistical significance (Van Dam and Earleywine, International Journal on Drug Policy, 2010).

Authors call these preliminary data and say they justify randomized clinical trial. Final analysis had twelve people, no control group, and symptoms were self-assessed. Result is therefore a premise, not a conclusion.

Less burden does not mean harmless. Vapor from dry herb also contains by-products, but in lower ratio to cannabinoids than smoke (Pomahacova et al., 2009). A device that does not maintain temperature can burn material. Full method comparison with evidence table is in bong, joint or vaporizer: what harms least. Common claims about vaporization are often exaggerated both ways: health promises and scaring with vapor alone.

What was EVALI and why did it concern liquids, not dry herb?

EVALI is lung injury linked to e-cigarettes and liquid cartridges, described as an outbreak in the USA. Review by Amjad et al. identifies vitamin E acetate ester as main cause. It was added as thickener to illegal THC liquids to dilute oil without changing viscosity (Amjad et al., IJERPH, 2025).

Studies in this review link vitamin E acetate to surfactant dysfunction, the layer reducing surface tension in lung alveoli. According to Amjad et al., the substance was detected in bronchoalveolar lavage fluid in most patients. After removing this additive from many products, case numbers dropped significantly, though isolated reports appeared later.

For dry herb vaporization, the conclusion is clear: EVALI concerned ready-made liquid cartridges, not plant heating. Vaporizing pure dry herb and inhaling vapor from unknown liquid cartridges are different situations, though marketing often groups them under vape. The riskiest cartridge is one bought outside legal circulation, as only the manufacturer knows its contents. Vitamin E acetate should not be in any inhalation cartridge.

What have vaporization studies not yet resolved?

The scale of benefits and long-term effects. Direction is consistent in all cited studies. Each has limitations preventing stating how much safer vaporization is than smoking over years. The clinical comparison involved 18 people over six days (Abrams et al., 2007). Four gaps remain open.

• No randomized lung function study. Authors of the 2010 spirometry study themselves said their data justify such a trial (Van Dam and Earleywine).
• Respiratory symptom data rely on self-assessment, and online survey does not control who participates. Someone buying vaporizer for health reasons may rate symptoms more mildly.
• Vapor composition was measured in lab on selected models with set vapor intake scheme. These measurements do not say how many decomposition products a home user inhales from portable equipment.
• Cited studies used THC-containing material. For dry herb with CBD dominance and trace THC, i.e. legally available in Poland, analogous measurements are lacking.

This does not invalidate results but sets how strong opinions they support. A fair conclusion is: vaporization performed better than smoking in every cited comparison. However, no one measured how much better over years. If someone gives a specific percent toxin reduction, ask for the publication source.

What are vaporization advantages and disadvantages?

The balance is favorable but not one-sided. Advantages include higher cannabinoid to by-product ratio than smoke (Pomahacova et al., 2009) and lower carbon monoxide in exhaled air (Abrams et al., 2007). Disadvantages include higher initial cost, warm-up time, and need for regular cleaning.

The first three advantages are measurement-based; disadvantages stem from device construction. None is the same for every device. THC recovery in vapor differed by over 28 percentage points among tested devices (Lanz et al., 2016). The same dry herb in two vaporizers can produce very different sessions.

Cleaning-related disadvantage is easiest to manage, as it comes down to habit. Just clean chamber and vapor path regularly per manufacturer instructions.

Who is a vaporizer for, and who should be cautious?

A vaporizer makes sense for someone who regularly uses legal hemp dry herb or herbs and wants to quit combustion. In clinical study, vapor from a temperature-controlled device produced comparable THC plasma concentrations with lower carbon monoxide than smoke (Abrams et al., 2007). For prescription patients, it is one administration route chosen by a doctor.

For someone using CBD dry herb, vaporizer is a way to benefit from cannabinoids and terpenes without smoke. Cited vapor studies used THC material, so results are approximation, not measurement, for CBD dry herb. For occasional use, cost spreads over few sessions. A simple portable or manual model without unused functions is a reasonable choice.

Vaporization is not for minors. It is not recommended during pregnancy or breastfeeding. People with lung diseases or psychotic disorders in history should consult a doctor before first session.

Another reason for consultation is regular medications. In a study on healthy volunteers, CBD-dominant extract (640 mg CBD and 20 mg delta-9-THC) given in a cookie increased area under curve of omeprazole by 207%, losartan by 77%, and midazolam by 56%. Delta-9-THC alone did not inhibit tested enzymes (Bansal et al., Clinical Pharmacology and Therapeutics, 2023). Oral extract at 640 mg CBD dose was tested, not vaporized dry herb, so scale does not directly translate to vapor. Cannabidiol mainly causes interactions. Caution is advisable with any administration route.

What next if you want to start using a vaporizer?

First choose device type, then learn its settings, and conduct first session following a simple procedure. Below is the shortest answer for each topic, in usual order.

One mistake connects almost all these topics: transferring smoking habits to a device that works differently. Too high temperature at start, packed material in chamber, and rapid inhale cause bitter taste or weak vapor. It is easy to mistake this for device defect. Typical beginner mistakes and fixes are collected in a post with tips for beginners, including step-by-step first session.

Summary: is a vaporizer for you?

A vaporizer is a device that evaporates dry herb without combustion. This one sentence explains both its advantage over a joint and limits of guidebook promises. Vapor from controlled temperature contained more cannabinoids relative to by-products than smoke in studies (Pomahacova et al., 2009). No one has measured benefit scale over years.

If you use legal dry herb regularly, vaporization is a reasonable alternative to smoking. If you use it rarely, calculate if cost spreads out. In both cases, distinguish dry herb vaporizer from e-cigarette: EVALI was linked to liquids, not plant.

Before first session, also check two things independent of device: dry herb composition on certificate of analysis and medications you take regularly. The first decides what reaches vapor, the second whether you need doctor consultation.

Electric devices are in the vaporizers category, and battery-free models in manual vaporizers. X-Max and Fenix editions and manual DynaVap M7 can be seen and discussed with staff in three u Bucha stores in Warsaw.

Frequently Asked Questions

What is vaporization?

Vaporization is the evaporation of active substances from the plant under heat, without combustion. Heat converts inactive acids into active cannabinoids: in electric devices decarboxylation was at least 97.3% for THC and 94.6% for CBD (Lanz et al., PLOS ONE, 2016). Vapor is produced without smoke, provided the device maintains temperature below combustion threshold.

Is a vaporizer the same as an e-cigarette?

No. A dry herb vaporizer heats shredded plant, while an e-cigarette evaporates ready-made liquid from a cartridge, usually based on propylene glycol and glycerin. They also differ in risk: the EVALI lung injury wave was mainly linked to vitamin E acetate in illegal THC liquids, not dry herb (Amjad et al., IJERPH, 2025).

Does vaporizer produce smoke?

No, if the device maintains temperature below combustion threshold. Vapor is produced, in which the ratio of cannabinoids to by-products at 200 and 230°C was higher than in smoke from a hemp cigarette (Pomahacova et al., Inhalation Toxicology, 2009). Thick gray smoke, black herb, or bitter taste indicate material started to burn.

How much THC transfers from dry herb to vapor?

In laboratory validation of five devices, total THC recovery in vapor ranged from 54.6 to 82.7% of content in dry herb, depending on model (Lanz et al., PLOS ONE, 2016). Older equipment generations and standardized material were tested, so home session with different herb and inhalation speed may yield different result.

Is vaporization healthier than smoking?

Data indicate it burdens respiratory tract less (Earleywine and Barnwell, 2007), but it is not harmless. In a study of 18 people, vaporization produced comparable THC plasma concentrations with lower carbon monoxide in exhaled air than smoking (Abrams et al., Clinical Pharmacology and Therapeutics, 2007). No long-term difference has yet been measured.

Is vaporizer legal in Poland?

Yes, the vaporizer itself is ordinary equipment. Legality depends on material: hemp dry herb is legal if sum of delta-9-THC and THCA does not exceed 0.3% dry weight (art. 4 point 5 of the Act on Counteracting Drug Addiction, Journal of Laws 2023 item 1939). Non-fiber hemp is available only by prescription as pharmaceutical raw material.

What is ABV?

ABV, from English already been vaped, is dry herb after vaporizer session. It is not devoid of active substances: even in the best of five tested devices, 82.7% of THC from herb transferred to vapor (Lanz et al., PLOS ONE, 2016). ABV potency is unknown, so dosing cannot be planned with it.

Can CBD oil be put into a vaporizer?

Not in a dry herb vaporizer. CBD oil drops are intended for oral administration, and liquid spilled in chamber soils screen and vapor path. Thick extracts require separate device or insert provided by manufacturer; this heating method is called dabbing.

This article is informational and educational and does not constitute medical advice. Before starting cannabis or CBD for therapeutic purposes, consult a doctor, especially if you take other medications, are pregnant, or breastfeeding.

Author: Michał Waluk · Published: 2026-05-04 · Updated: 2026-10-27