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Tobacco products have evolved over the years, with different technologies offering alternatives to traditional cigarettes. One example is heated tobacco, which uses an electronic device to heat specially designed tobacco sticks instead of burning them. IQOS is one of the best-known systems in this category and has attracted attention among adult tobacco users in the UK. For beginners, understanding how the technology works can make it easier to recognise the differences between heated tobacco, conventional cigarettes and vaping devices. But how does IQOS work, what happens inside the device, and what should UK users know before considering this type of product?

What Is IQOS and How Does It Work?

IQOS is an electronic heated tobacco system designed to heat specially prepared tobacco sticks. Unlike conventional cigarettes, which burn tobacco to produce smoke, heated tobacco devices use controlled heating technology to generate an inhalable aerosol containing nicotine and other chemicals. The basic principle is known as heat-not-burn technology. Instead of using a flame, the device relies on an electronic heating system powered by a rechargeable battery. When a compatible tobacco stick is inserted, the device heats its contents to a controlled temperature. This releases nicotine-containing aerosol that the user inhales through the mouthpiece. The exact heating mechanism depends on the device generation. Some earlier systems use a heating blade, while newer induction-based systems heat a specially designed element inside the tobacco stick.

How Does Heated Tobacco Technology Work?

To understand the process, it helps to look at what happens inside the device.

The technology involves three main stages:

1. Inserting a Specially Designed Tobacco Stick

Heated tobacco devices require compatible tobacco sticks rather than ordinary cigarettes or e-liquids. These sticks contain processed tobacco specifically prepared for controlled heating. They are designed to fit into the device's heating chamber or holder. Different device generations may require different stick formats, so compatibility is important.

2. Heating the Tobacco

Once the device is activated, its electronic heating system warms the tobacco. The temperature is controlled to avoid the conventional combustion process associated with burning cigarettes. Depending on the model, the heating element may come into direct contact with the tobacco or use induction technology.

3. Producing an Inhalable Aerosol

As the tobacco heats, it releases an aerosol containing nicotine and other substances. The user inhales this aerosol through the mouthpiece. The experience is different from conventional smoking because the tobacco is heated rather than burned. However, heated tobacco emissions still contain harmful substances, and the product is not risk-free.

What Are the Main Components of an IQOS Device?

A heated tobacco system generally includes several components that work together.

• Holder: The handheld section that contains the tobacco stick during use.

• Heating system: The electronic mechanism responsible for warming the tobacco.

• Battery: Supplies power to operate the heating system.

• Charger: Recharges the device or holder, depending on the model.

• Tobacco sticks: Specially designed consumables that contain processed tobacco.

These components work together to provide a controlled heating process without requiring a lighter or conventional flame.

IQOS vs Cigarettes: What Is the Difference?

Although both products contain tobacco and deliver nicotine, their operating methods are different. Traditional cigarettes burn tobacco at high temperatures, producing smoke, ash and numerous harmful chemicals. Heated tobacco devices use an electronic heating system instead of a burning process.

Here are some key differences:

It is important to understand that a difference in emissions does not mean heated tobacco is harmless. It still exposes users to nicotine and potentially harmful chemicals.

How Is Heated Tobacco Different from Vaping?

Heated tobacco and vaping devices may look similar because both use rechargeable electronic technology. However, they operate differently. Heated tobacco devices warm specially prepared tobacco to release nicotine-containing aerosol. Vaping devices, on the other hand, heat an e-liquid that may contain nicotine, flavourings and other ingredients. The main difference is the material being heated. One uses processed tobacco, while the other uses a liquid. They should not be treated as interchangeable products because their ingredients, emissions and potential health effects differ.

What Should UK Beginners Know About Heated Tobacco?

Before learning more about heated tobacco in the UK, it is important to understand the relevant regulations and health considerations.

Age Restrictions and Regulations

Heated tobacco products are regulated under UK tobacco legislation. Age-of-sale requirements and other tobacco product rules apply. The Tobacco and Vapes Act 2026 also introduces further controls, including a generational restriction on tobacco sales for people born on or after 1 January 2009, subject to its commencement provisions. Consumers should check the latest applicable rules before purchasing or using any tobacco product.

Nicotine and Health Considerations

Heated tobacco products contain nicotine, which is addictive. Their emissions can also contain harmful and potentially harmful substances. Although heating tobacco can reduce the levels of certain chemicals compared with cigarette smoke, this does not establish an equivalent reduction in health risks. The long-term health effects of heated tobacco are still being studied. People who do not currently use tobacco should not start using heated tobacco products. Anyone considering stopping smoking should speak to a healthcare professional about established smoking cessation support.

Device Compatibility and Maintenance

Different generations of heated tobacco devices may use different tobacco stick formats. A stick designed for one system may not work with another. Users should always follow the manufacturer's instructions for charging, handling and maintaining electronic devices. Using incompatible consumables or attempting to modify the heating system can create safety and performance problems.

Final Thoughts

Understanding how IQOS works starts with one simple concept: it heats specially designed tobacco instead of burning it. Its electronic heating system, rechargeable battery and compatible tobacco sticks work together to generate an inhalable aerosol. However, heated tobacco is still a tobacco product, not a risk-free alternative. Nicotine addiction and exposure to harmful chemicals remain important considerations. For UK beginners, understanding the technology, product compatibility, regulations and health implications provides a more complete picture of how heated tobacco systems operate.

FAQs.

Does IQOS burn tobacco?

No. The technology is designed to heat specially prepared tobacco rather than burn it. This produces a nicotine-containing aerosol instead of conventional cigarette smoke.

Is IQOS the same as a vape?

No. Heated tobacco devices heat processed tobacco, whereas vaping devices heat e-liquid. Both use electronic heating technology, but their contents and emissions are different.

Do heated tobacco devices contain nicotine?

Yes. Tobacco sticks used with heated tobacco devices contain nicotine, which is an addictive substance.

Can regular cigarettes be used in heated tobacco devices?

No. These devices are designed for specially manufactured tobacco sticks. Regular cigarettes are not compatible with their heating systems.

Is heated tobacco legal in the UK?

Heated tobacco products are regulated under UK tobacco legislation. Age restrictions and additional product controls apply. Consumers should check current legislation before purchasing these products.