ZERO BREEZE Battery Operated Portable Air Conditioner

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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For RVs

Your home on wheels, now cooler.

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For Pets

Comfort they need, even if they can't say it.

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For Car Racing

The track's hot enough. Stay sharp and cool.

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For Jobsites

Keep your tools running, and your mind cool.

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For Athletes

Don't let the heat set your limits.

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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.

By custom-fitting the evaporator, condenser, fans, and ductwork into a compact, travel bag–sized body, Mark 3 achieves its uniquely small footprint without compromising performance.

The built-in micro sensor monitors water levels and automatically activates the internal pump when needed. No manual emptying, just uninterrupted cooling.

The Mark 3's detachable 1022Wh battery supports 12 to 60V DC input—including solar and car—and AC charging. It can power the unit while recharging and enables longer runtimes when paired with extra modules.

A 2.4G smart remote with real-time feedback that mirrors the unit's status. Easily control every setting and see instant updates from anywhere nearby.

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

A white boat floating on the clear blue sea, under a vibrant blue sky dotted with soft, fluffy white clouds.

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.

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.

Two kids are sitting inside a yellow tent on a sandy beach, with a green kayak placed beside the tent and mountains in the background.

Struggling to Sleep While Family Camping? Discover the Mark 3 Portable AC for Camping

Camping with kids in the summer heat can lead to sleepless nights, leaving everyone cranky and exhausted. The ZERO BREEZE Mark 3 Portable AC offers a perfect solution. With its powerful cooling, portability, and quiet operation, the Mark 3 ensures a peaceful night’s rest for the whole family. No more struggling with the heat—just cool, comfortable sleep. Ready to enjoy camping without the discomfort? Read on to discover how the Mark 3 can help!

A dynamic scene from a motorsport event shows multiple race cars are speeding down the track, with fans in the background cheering as the cars race past the pit area.

The Secret to Staying Cool on Race Day: Meet ZERO BREEZE

Staying cool in extreme heat is a race day challenge every IndyCar team faces. With temperatures in the cockpit reaching up to 140°F, keeping drivers cool is critical. Discover how the ZERO BREEZE portable air conditioner goes beyond traditional cooling methods to provide focused, powerful, and portable cooling to help drivers perform at their best—no matter the heat.

ZERO BREEZE & Patrick Emerling Partnership

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.

Update on ZERO BREEZE Mark 3 Portable AC at CES 2025

Is This Really an Air Conditioner? A Look at ZERO BREEZE at CES 2025

As CES 2025 wraps up, we're excited to update you on the ZERO BREEZE Mark 3, our most portable outdoor air conditioner. The top question we’ve heard? 'Is this really an air conditioner?' Yes, it is! Not traditional, but an innovative portable unit. Powered by a unique micro compressor, Mark 3 delivers real cooling power in a compact form. Read on to uncover its story and see it firsthand at the show.

A person easily carries a Zero Breeze Mark 3 portable air conditioner up a ladder, indicating its lightweight and portable design for outdoor adventures.

What Is a Good Portable Air Conditioner for Outdoor Use?

Summer heat can be unbearable, especially when you're outdoors—whether camping, working, or racing. ZERO BREEZE Mark 3 is the perfect portable air conditioner, designed to meet all your cooling needs with its portability, flexible power options, energy efficiency, and enhanced user experience. Stay cool, anywhere with Mark 3.

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.

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.

Embracing Change: From Wilderness to a Home Away from Home

Looking to enjoy the wilderness without sacrificing comfort? More and more outdoor enthusiasts are embracing glamping, a luxurious twist on traditional camping. In this article, Dave Gallagher shares how he transformed his outdoor experience with the ZERO BREEZE Mark 2 portable air conditioner and other creative innovations. From his early days camping with family to building a custom rooftop tent system, Dave’s story highlights the growing trend of balancing adventure with modern convenience. Learn how glamping makes nature accessible to everyone while creating...

From Land to Sea, and Even Above with ZERO BREEZE Mark 2

The ZERO BREEZE Mark 2 portable air conditioner is a versatile and reliable cooling solution for outdoor enthusiasts. Its compact size, quiet operation, and easy setup make it ideal for various activities, from camping to flying. Customers have praised its effectiveness in keeping them cool and comfortable in diverse environments, including tents, vans, trailers, trucks, rooftop tents, boats, and even aircraft.