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 Semi-Trucks

Beat the heat, not your engine.

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For RVs

Your home on wheels, now cooler.

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For Overlanding

Go wild, not sweaty.

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For Boats

You escape to the water, not the heat.

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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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For Car Racing

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

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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

As seen on

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Dive into Our World

Applications News Stories

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.

DIY Air Conditioner for Sprinter Van Motorhome

Two different placing setup of the ZERO BREEZE Mark 2 AC for indoor and outdoor. Both meet your limited RV space and cooling needs. The ZERO BREEZE Mark II definitely can cool the bedroom area to make the space more comfortable; however, the most effective use of the ZERO BREEZE is as a spot cooler, having it blow a chilly breeze on you while you sleep - - you'll need a blanket, because it's pretty darned cold.

The best AC for my SeaArk ProCat 200 Boat

I recently installed a ZERO BREEZE Mark 2 in my Sea Ark Procat 200 Catfishing Boat in order to fish for longer periods of time on hot days in Arkansas. The unit far exceeded my expectations in terms of keeping me cool while fishing with and without the Bimini Top Up.

Cool My Lab Pet at the Office

ZERO BREEZE truly has impacted my life in a positive way. I have a Chocolate Lab that comes to work with me every day. Our office is pet-friendly but incredibly hot. All-year-round. Until I met ZERO BREEZE.

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.

ZERO BREEZE Mark 3 Portable AC at CES 2025

ZERO BREEZE Unveils the Most Portable Air Conditioner Mark 3 at CES 2025

Discover the future of portable cooling with ZERO BREEZE Mark 3 at CES 2025. Compact, powerful, and designed for outdoor adventures, this portable AC brings effortless comfort wherever you go. With innovative features like off-grid power, customizable cooling modes, and easy portability, it’s the ultimate solution for beating the heat. Visit us at CES 2025 in Las Vegas (Booth 9744, North Hall) to experience it for yourself!

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.

The latest ZERO BREEZE Mark 3 portable ac

Experience Ultimate Outdoor Comfort with the ZERO BREEZE Mark 3

The ZERO BREEZE Mark 3 is a versatile portable air conditioner designed to provide ultimate comfort in any outdoor setting. With its powerful cooling, efficient dual-hose system, and customizable settings, it's the perfect companion for camping, fishing, or any outdoor adventure. Its compact design, convenient power options, and energy efficiency make it easy to carry and use, ensuring you stay comfortable and refreshed wherever you go.

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.

Is Air Conditioning in Overlanding a Luxury?

Discover whether air conditioning is a luxury or necessity for overlanding. Explore the benefits of portable air conditioning, including comfort, safety, and improved travel experience. Learn how innovations like the ZERO BREEZE Mark 2 can enhance your overlanding adventures, ensuring you stay cool and comfortable in the great outdoors. Read more to find out how to make your trips more enjoyable and why having air conditioning can be a game-changer for overlanders.

Why I Quit 'Hard Mode Camping': A Story from Mark 2 User, Mike

That night, I slept like a baby in the cool breeze from the air conditioner. The next day, I felt refreshed, like I was back to my old camping self. My friend said something that really stuck with me: "We started camping to have fun." That got me thinking.

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.

The day we were on the driveline

The Mark 2 AC has been used worldwide in a variety of fields. Mark 2 cools the battery at the starting grid before the race to keep the car in prime condition.