Mark 3: The World's Smallest and Lightest 5,280 BTU Portable AC

Built for tents, vans, trailers, semi-trucks, boats and every place the heat follows you.
Explore Mark 3

Where You Go, Mark 3 Cooling Follows

For Camping

Summer nights shouldn't feel like saunas.

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For Boats

You escape to the water, not the heat.

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For Semi-Trucks

Beat the heat, not your engine.

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For Overlanding

Go wild, not sweaty.

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Need a Custom Solution?

Haven’t found your application? Contact our expert for a customized solution.

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Innovation at Its Core

MicroCool™ Compressor
CoreFit™ Cooling System
AutoDry™ Drainage
FlexPower™ Pack
CoolSync™ Remote
Unlike other "portable" ACs that rely on bulky 8–12 kg compressors, Mark 3 uses a custom 1.8 kg 48V micro-compressor to deliver true portability with 5,280 BTU of whisper-quiet cooling power.

A Decade of Commitment

We weren't the first to imagine portable AC, but we've spent nearly a decade making it real. Across three generations of outdoor air conditioners, we've pushed boundaries and refined every detail. While others settled for compromises, we stayed true to one belief: true portability matters.

Our mission is simple. We want to ease outdoor living with innovations. That's why we focus on building compact, powerful, and reliable solutions that help outdoor people stay cool, safe, and refreshed wherever they go.

From left to right, Mark 3, Mark 2, and Mark 1 are displayed on rocks, showcasing the different models.
Trusted Globally

Used in over 60 countries, from scorching deserts to racing tracks, by adventurers, professionals, and everyday users.

A racecar driver is holding an air cooling hose, staying cool and focused before a race.
An HVAC technician in a blue protective uniform performs maintenance on a large industrial air conditioning unit.
A black helicopter is parked on the ground, ready for takeoff.
The Mark 2 portable AC is installed on a boat's deck, with its flexible duct connected to the front air outlet, providing cool air to the cabin.
The Mark 3 is placed inside a van, providing cooling comfort to a person working on DIY renovations.
A golfer enjoys a refreshing breeze provided by the Mark 2 portable air conditioner installed in the rear of his golf cart.
A driver is working under a semi-truck, with the Mark 2 providing cooling through a flexible duct.
The Mark 2, with its flexible duct, keeps a white puppy cool and comfortable in a truck cab.
A man carries the Mark 3 in one hand while climbing a ladder to his rooftop tent.

What Our Customers Say

★★★★★

“Yes it's expensive but compared to a 12K APU it's damn worth it and must have to every OTR and Regional truck driver. Batteries charge very fast while driving takes about 4 hours for both and each battery gives you at least 5 hours of cooling before it switch to the second battery, you can stack them. ”

@Jordan Bar
★★★★★

“I used my Mark 2 on heck of a lot. It really did what I wanted it to and that was to cool my small sleeper on my 384 Peterbilt. For several years. So far the Mark 3 has potential for me. I like it so far and it gets much cooler that the Mark 2. "

@Travels of ShadoWolf
★★★★★

“Delighted to receive Mark 3 and 2 batteries I ordered in September. It will work well in my Hymer Aktiv Class B campervan. Packaging, unit, batteries all top-notch quality. After running it for maybe 5 minutes, I am confident it will be worth the wait. Photo shows output air temperature, running it "bare", no hoses. ”

@Cindy M Foster
★★★★★

"I was part of the funding group for this new Zero Breeze Mark3, it just arrived. This thing rocks. It only weighs 22 lbs. Can be run off ac, solar or a clip on battery (1022w). The unit sells for $1299 which is way cheaper than a dc inverter marine AC. I think these will become very popular. I'm using it for boating, camping, garage and when working outside. "

@whatta life
★★★★★

“I am more than happy with my Mark3, is working like a dream. I just sold my EcoWave2 air conditioner as it was extremely cumbersome & very, very heavy to use - my ZeroBreeze Mark3 is far superior on many levels & very easy to use. Thank you for a wonderful product. ”

@Jackie Morton
★★★★★

"I have owned approx 2500 aircraft and been flying for 40+ years. With the air in the cabin similar to a car with no airflow in the Summer it can be 130 degrees until you get to altitude. So far the Mark 3 is pretty nice. I put the outlet hose between the 2 front seats so it cools the front of the aircraft well. This really is one of the best things to come along for flying in the Summer. It's portable and doesn't physically connect to the plane. "

@Tony Plant

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Dive into Our World

Applications News Stories
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What is the Best Portable AC for Boats?

Summer boating can be challenging due to heat and humidity, especially inside a small boat cabin. The ZERO BREEZE Mark 3 offers a portable and efficient solution, providing powerful cooling without the need for complex installation. Teddy, a boat owner, shares his positive experience using the Mark 2 to cool his boat's cabin during summer trips. With enhanced cooling power and portability, the Mark 3 is the perfect upgrade for boaters seeking comfort on the water.

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Real User Feedback: Are Semi-Truck Drivers Satisfied with the Mark 2 Portable A/C and How They Use It?

Real User Feedback: Are Semi-Truck Drivers Satisfied with the Mark 2 Portable A/C and How They Use It?

Discover how semi-truck drivers are staying cool on the road with the Mark 2 portable A/C. Read real user feedback, learn setup tips, and find out if this installation-free solution meets their needs.

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ZERO BREEZE & Patrick Emerling Partnership

ZERO BREEZE & Patrick Emerling Partnership

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Zero Breeze x Patrick Emerling collaboration features the Mark 3 AC and text

ZERO BREEZE Partners with Patrick Emerling: Where the Cool Meets the Fast

ZERO BREEZE is proud to announce its partnership with NASCAR Xfinity Series driver Patrick Emerling. The collaboration brings the Mark 3 portable air conditioner to the track, helping Emerling stay cool and focused while offering the same comfort to race fans at campgrounds. This partnership highlights innovation in cooling technology, ensuring top performance and comfort during intense race conditions.

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A person with a smile on her face is carrying the Mark 3 portable air conditioner with one hand while walking.

ZERO BREEZE Portable Air Conditioners on the Racetrack

ZERO BREEZE portable air conditioners are making a big impact on racetracks worldwide, from NASCAR to student solar and electric racing teams. With unmatched portability, the Mark 2 and Mark 3 provide instant cooling for drivers and critical components, ensuring peak performance in high-heat environments. Discover how portability drives success on and off the track.

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The Mark 3 portable air conditioner sits near a lake, placed on a storage box next to a camping chair and a table with drinks and snacks, providing a comfortable cooling solution for outdoor relaxation.

Why I Upgraded Mark 2 to Mark 3: My Amazing Portable AC for Camping

The Mark 3 portable air conditioner is here! Compact, lightweight, and battery-powered for ultimate portability, it’s now more powerful and functional than ever. Wondering why Brian, a valued customer who’s used Mark 2 for nearly 5 years, decided to upgrade? Discover what led him to choose the Mark 3 and get his expert tips for using a portable AC.

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