The Mark 3 is ZERO BREEZE's latest portable air conditioner, boasting a cooling capacity of 5,280 BTU. Weighing just under 22 pounds, it features a multi-function climate control system that allows you to set and maintain temperatures between 61°F and 88°F, suitable for spaces ranging from 100 to 150 square feet. Whether camping or living on the move in a van, trailer, or tiny house, the Mark 3 offers unmatched convenience for all your climate control needs.

ZERO BREEZE Mark 3. Innovation. Inside and Out.

Keep Cool Wherever You Go

5,280 BTU | 22 lb | 46 dB

More cooling per pound than ANY portable AC. Period.

How Mark 3 Compares in the Real World

Thermostat Setting

We know everyone experiences heat differently so take advantage of the thermostat feature and let yourself forget that the temperature was ever an issue. Adjust the cooling, heating, and dehumidifying ranges freely according to your needs.

Innovation Made for Outdoor Cooling

True Portable Cooling

Unlike other "portable" ACs with bulky 18-26 lbs compressors, Mark 3 integrates a custom 3.9 lbs 48V micro-compressor, delivering true portability and 5,280 BTU of whisper quiet cooling power.

Purpose-Built Cooling System

Mark 3 isn't made from stock parts. It's evaporator, condenser, fan, and duct system are custom fitted into compact, travel-bag-sized body, allowing for fast hose setup and smooth, quiet airflow.

Hands-Free Drainage

The built-in micro sensor monitor water levels and activates the internal pump to drain automatically. No manual emptying, just interrupted cooling.

Flexible Off‑Grid Power

Mark 3's detachable battery supports 12-60V DC, solar, car and AC charging. It powers the unit while charging and enables extended runtime with extra modules.

7 Modes Tailored for Your Outdoor Adventure

Whether you need rapid relief after a day in the sun or gentle airflow for a restful night, Mark 3 adapts to every outdoor moment. With versatile settings like Rocket, Cool, Sleep, Fan, Dry, Care, and Heating, it is built to handle heat, humidity, and changing conditions wherever your adventure takes you.

Reliable Power for Every Outdoor Moment

The Mark 3 battery supports a wide 12–60V DC input range and features a built-in 500W MPPT module for efficient solar charging. It reaches 80% charge in just 2 hours. With a 1022Wh capacity and built-in extendable cable, it also includes USB-C, USB-A, and Anderson outputs so you can charge your phones, laptops, and other mobile devices—anywhere you go.

Upgraded Power Supply System

It's not just an air conditioner, it's a 48V cooling system.