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How Does a Hookah Work?
Last updated on 29/04/2025 | Reading time approx. 02:53 min
What You'll Learn in This Article
- How the individual parts of a hookah interact and what their functions are
- Why a vacuum is created when inhaling and what it triggers
- How charcoal, tobacco, and air react to produce smoke
- What happens as the smoke passes through water and why it bubbles
- What a blow-off is and how this effect works technically
- Additional tips on diffusers, smoke production, and structural variations
How a Hookah Works
If you've always wondered how a hookah works – how it's possible to smoke shisha tobacco through a water-filled glass base – you're in the right place. In this article, we’ll walk you through the individual components of a hookah and provide all the essential information you need to understand the basic principle that applies to pretty much every hookah. To do that, it's important to know the individual parts of a hookah:
1. Charcoal / 2. HMD / Foil / 3. Tobacco / 4. Bowl / 5. Bowl adapter / 6. Charcoal tray / 7. Stem / 8. Stem Heart / 9. Hose connector / 10. Downstem / 11. Diffuser (optional) / 12. Glass base / 13. Water / 14. Hose / 15. Mouthpiece
A more detailed explanation of the individual parts of a hookah can be found in this article: The Structure of a Hookah.
This is How a Hookah Works
Let’s assume your hookah is already set up and ready for a session. There’s water in the glass base, your bowl is filled with your favorite tobacco, and the charcoal has been lit and placed in the HMD, so you're good to go.
You grab the mouthpiece, place it to your lips, and take a deep pull. As you inhale, air is drawn through the hookah hose out of the glass base. This creates a vacuum inside the base.
If your hookah were made of very thin material, it would collapse at this point. But since that's not the case, the vacuum is equalized by drawing in air from the next weakest point – which in this case is the air inside the downstem submerged in water. As this isn't enough to compensate for the vacuum and the missing air in the downstem also needs to be replaced, fresh air is drawn in from outside the hookah.
This fresh air now flows past the charcoal, heating it up even more. The charcoal then heats the tobacco, causing part of the molasses and the flavors in the tobacco to evaporate. This produces smoke and even more heat.
Note: Technically speaking, the tobacco isn’t burned – it's more of a slow-drying smoldering process.
Everything about bowls, accessories, and how to pack the perfect bowl: If you want to dive deeper into hookah bowl setup, check out this article.
The hot smoke then travels down the smoke column and into the water of the glass base. There, it is cooled and creates the iconic bubbling sound of a hookah as it rises through the water.
Tip: If you have a diffuser at the end of your downstem, it can significantly reduce that bubbling noise.
Next, the smoke flows through the base, along the hose, and ends up exactly where the vacuum was created – in your lungs. That’s basically it. Almost every hookah on the market operates on this same principle. Blow-off systems, however, work a little differently.
So How Does the Blow-Off Work?
Unlike regular smoking, blow-off systems function a bit differently. With a blow-off, the smoke no longer needs to be cooled, meaning it doesn’t have to be pushed back through the water.
Instead, you exhale the drawn-in smoke directly through dedicated outlets in the base.
These outlets usually contain small balls. When you inhale, these balls are sucked into place to block fresh air from entering through the exhaust ports. During the blow-off, however, the pressure in the glass base increases, pushing the balls up and allowing the smoke to escape through the designated blow-off outlets – depending on the design of the hookah.
The difference between smoking and blow-off
Some hookahs even feature a variable blow-off system, which can be adjusted between sessions – or even during the session – with just a few simple steps.
The Best Hookahs 2025: We take a detailed look at the best hookahs in this blog article.
We hope we’ve answered all your questions! We’re always happy to receive your feedback. And of course, you’ll find a wide selection of hookahs in our shop.
Visit Our Hookah ShopFAQ: How Does a Hookah Work?
What happens when I draw on the hookah?
When You draw on the mouthpiece, negative pressure is created in the glass base. This pulls air from the outside through the charcoal. The charcoal heats the tobacco, which creates smoke. The smoke travels through the water in the glass base, is cooled down and then reaches You through the hose.
Which parts does a hookah consist of?
A typical hookah consists of the following components:
- Charcoal
- HMD or aluminum foil
- Tobacco
- Bowl & bowl adapter
- Charcoal tray
- Stem
- Stem heart
- Hose connector
- Downstem
- Diffuser (optional)
- Glass base with water
- Hose
- Mouthpiece
Is the tobacco burned when smoking hookah?
No. The tobacco is not burned, but slowly heated by the heat of the charcoal. Molasses and flavors evaporate during this process – it is a smoldering process, not combustion.
What does a diffuser do on a hookah?
A diffuser makes the bubbling sound while smoking significantly quieter. This is very practical if You want to watch videos while smoking, for example, or if the apartment has thin walls.
How does the blow-off work on a hookah?
During the blow-off, smoke is actively blown out of the glass base through designated openings. Small balls in these outlets lift due to the overpressure and allow the smoke to escape. Depending on the hookah design, a blow-off can be implemented in very different ways.
Can the blow-off be adjusted on every hookah?
No. Variable blow-off systems were very popular for a while and still have their place in the community. In our shop, for example, You can find the Moze Breeze Two, the Moze Breeze Pro and the Moze Varity, which offer this feature. Back then, the Breeze Two was even at the center of the hype around variable blow-offs.
Are there differences in the construction of hookahs?
Yes, even though the basic principle is the same for all hookahs. Differences mainly exist in the design, the blow-offs, the materials used and the accessories – and exactly these details have a noticeable influence on the smoking behavior.