The Arizer Air is a firm favorite in the vaporizer community. It’s easy to use and maintenance free, heats up fast, and produces good thick clouds. It also features custom session settings, long-life interchangeable batteries, and is perfectly portable. Arizer’s latest model – the Air 2 – has refined all the tried and tested features of the Air and Solo. What more could you look for in a vaporizer? Well, you might want to check out the other new kid on the block and the Air 2’s main competition – the Utillian 721. Let’s compare their respective features and benefits and see how they stack up.


Vapor Quality

Arizer Air 2

The vapor quality of the Air 2 is good. It’s smooth and full of flavor, although it’s not as dense as the clouds the Utillian 721 can deliver. In this respect, the Air 2 isn’t much of an improvement on the original Air model.

The Air 2 provides a smooth cool draw that lets you enjoy the full flavor of your herbs. This is due to the all-glass vapor path, which is easy to keep clean and avoids flavour contamination. The glass also helps cool the vapor as you inhale, which gives a smoother taste.

A drawback to the glass stem is that it constricts airflow. Air 2 goes some way toward fixing this, but it still falls short of the more free-flowing Utillian 721.

Utillian 721

The Utillian 721 uses convection heating. In a convection vaporizer your herbs are cooked by passing hot air your herbs, rather than by direct contact with the heating element. Not only does this result in freer airflow and denser clouds, it also produces a fuller flavour over a longer period. It also vaporises your herb more efficiently.

The 721’s mouthpiece is made out of plastic rather than glass. However, we found that this had virtually no effect on the flavour. The plastic mouthpiece can be removed to provide easy access to the air path for cleaning, which helps avoid flavor contamination.

Overall vapor quality is where the Utillian 721 really shines; this and the fact that draws can be easily customized to the user’s preferences.



Vapor Quality Winner: Utillian 721


Build Quality

Arizer Air 2

Arizer is known for the manufacturing quality of its products. They’re durable and easy-care.

The Achilles’ heel of the Air 2, however, remains its removable glass tubes. While glass gives great vapor quality, it’s fragile and you can find yourself having to frequently buy replacement parts.

An advantage that the Air 2 does have over the 721 is its removable battery. If the Air 2’s battery fails, you can simply replace it. If the battery goes in the 721, you’re looking at having to replace the whole unit.

The Air 2 comes with unlocked precision temperature control, ranging from 180-215°C. This gives users a decent choice of temperatures at which to cook and is a huge improvement on the five fixed heat settings the original Air offered.

The Air 2 is operated by three buttons and a digital display. The bottom button is the on-off switch and doubles as the menu button to access all the device settings. The top two are + and – buttons for temperature adjustment. This gives the user enhanced temperature control compared to the original Air.

The Air 2 is a bit fussier, in that you pack your herbs into the bottom of the glass mouthpiece. With the 721 they go straight into the heating chamber.

Utillian 721

The 721 uses a more robust plastic mouthpiece that can better withstand being dropped or knocked around. For added safety, the mouthpiece swivels to lie flush with the unit for safe and easy storage.

In terms of temperature control, the Utillian 721 is a little more complicated than the Air 2. It features four base temperatures, with a facility to boost each setting by five degrees. This effectively gives the user eight heat settings, from 180-220°C, which offers good flexibility.

The Utillian 721 has just one button. You operate the device by clicking on this single button. This makes it a bit less fussy than the Air 2. You just press the button the required number of times to access the unit’s corresponding functions.

With the 721 you pack your herbs straight into the heating chamber itself. You just remove the magnetic cap to expose the heating chamber and load your herb straight in. This makes for less hassle when you’re trying to pack the device while on the go.


Build Quality Winner: Air 2



Arizer Air 2

The portability of the Air 2 is much the same as that of the original Air, unless you count the improved battery life. That is a definite improvement.

In terms of battery life, we found the Air 2 to last about 45 minutes between charges. This equates to about 2-3 sessions per charge. That said, the Air 2 battery does have a higher capacity than the original Air model, and gives a slightly better performance when out and about.

The main shortcoming of the Air 2 remains the glass air stems, which you have to remove from the device and carry separately. Also, the fact they are glass means they are easily breakable. You need to have something to carry the unit in, like a vaporizer case, and use caps for the stems. The last thing you want is a glass stem breaking in your pocket.

Utillian 721

The Utillian 721 has been designed for easy portability. It’s slim, sleek and lightweight and slips easily into your pocket.

The mouthpiece is designed to swivel in and out, so it can remain flush for easy storage. Add to this the 721’s exceptional battery life and you’ve a device that’s great for taking out and about.

The Utillian 721 has a built-in, non-replaceable lithium polymer battery, which lasts 90 minutes between charges – longer than that of the Air 2.

Another advantage the 721 has over the Air 2 is it can be charged via a standard USB, while the Air 2 requires a proprietary charger/power adaptor.



Portability Winner: Utillian 721



Arizer Air 2

The Air 2 is similar in size to its predecessor. It resembles a larger vape pen or e-cig. In all, with the glass stem extended, the Air 2 is about seven inches tall, which make it pretty unobtrusive.

Utillian 721

The Utillian 721 is more compact than the Air II. It can easily be concealed by your hand and is no more conspicuous than an e-cigarette.

Because the 721 uses convection heating, your herb cooks only as you draw from the device, with all the aroma coming from your exhales. This reduces the odor from the device during sessions, making it less noticeable.



Discreetness Winner: Utillian 721


Winner: Utillian 721

Both the Air II and the Utillian 721 are great devices. Both do the job required of them and both provide a very flavorable vapor.

However, for us, the Utillian 721 has the edge. It gives a better flow, you don’t have any glass components to worry about, it gives you more sessions between charges, it’s easier to pack, it offers greater temperature flexibility, and it’s slightly more discreet.

If you are thinking of picking up a Utillian 721, we recommend grabbing them from Tools420.

Also be sure to check out how these units stack up against the field with our Portable Vaporizer Ranking.

About The Author

Senior Content Specialist

Dan is a writer with a massive vaporizer collection who loves video games, superhero movies, finding new music, comic and regular books and critically deconstructing those things until he wonders why he liked them in the first place. He's also a pragmatic fitness enthusiast who believes that the best actions you can take in your daily life are those that help you reach your goals, and that naps are the most lofty, but also the most noble goal one can have.

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