The ZERO BREEZE Mark 3 is the third-generation portable air conditioner, developed based on the success of the Mark 2 and valuable customer feedback. It features a unique built-in micro twin-cylinder compressor that delivers true refrigerated air, without ice or water required.

Compact and lightweight (22" x 10" x 12", 22 lbs), the Mark 3 is designed for portability and is compatible with both battery and AC/DC power sources. With an upgraded cooling capacity of 5280 BTU, it can set and maintain a target temperature between 61℉ and 88℉ for spaces ranging from 100 ft² to 150 ft².

Powered via 48V DC or 100V-240V AC, the Mark 3 is ideal for off-grid and on-the-go cooling. It's perfect for use in tents, vans, RVs, semi-truck cabins, offices without central AC, construction sites, or outdoor events such as races, baseball games, tennis matches, or golf tournaments. It also serves as a reliable emergency cooling solution during power outages and a safe, efficient way to keep your pets cool.

To achieve a truly design without compromising performance, ZERO BREEZE developed a custom 48V micro twin-cylinder inverter compresoor. Roughly the size of a soda can and less than one-quarter the size and weight of traditional compressors, this proprietary component enables the Mark 3 to deliver powerful, real air conditioning in a highly compact form, unlike swamp coolers or fan-based alternatives.

ZERO BREEZE offers two models: Mark 3 and Mark 2. Both are portable and battery-powered, but they serve different needs. Here's a clear comparison to help you choose:

Mark 3: For Larger Spaces and More Features

• Cooling Capacity: 5280 BTU
• Power Consumption: 150-500W
• Recommended Coverage Area: 100–150 ft²
• Working Modes: Rocket, Cool, Sleep, Fan, Dry, Care, Heat
• Thermostat: Yes—adjustable temperature and dehumidification
• Smart Control: Touch panel, wireless remote, and app control
• Power Options: 48V DC battery or 100V–240V AC
• Noise Level: 46dB(A)—quieter operation
• Special Features: Dehumidification, active drain system, breathing LED light
• Weight & Size: 22 lbs / 22" x 10" x 12"

Mark 2: For Simpler Needs and Smaller Spaces

• Cooling Capacity: 2300 BTU
• Power Consumption: 100-240W
• Recommended Coverage Area: 25–40 ft²
• Working Modes: Rocket, Cool, Sleep, Fan
• Thermostat: No thermostat or heating function
• Control Options: Touch panel and IR remote
• Power Options: 24V DC battery or 100V–240V AC
• Noise Level: 52dB(A)
• Special Features: Basic dehumidification, LED light
• Weight & Size: 16.5 lbs / 20" x 10" x 11"

For more detailed guidance, visit: How to Choose

For Mark 3 Basic (AC Only), the package includes the following:

• ZERO BREEZE Mark 3 Air Conditioner x 1
• 100V-240V AC Power Adapter for Wall Outlet x 1
• 2.4G Wireless Remote Controller x 1
• Drainage Pipe x 1
• Front Outlet Duct x 1
  Φ4.33" (11 cm)
• Front Inlet Duct / Rear Inlet Duct x 1
  Φ5.12" (13 cm)
• Rear Outlet Duct x 1
  Φ5.91" (15 cm)
• Front Inlet Adapter x 1
• Front Outlet Adapter x 1
• Rear Inlet Adapter x 1
• Rear Outlet Adapter x 1
• ZERO BREEZE Mark 3 User Manual x 1

Window adapters were included as part of the initial crowdfunding packages, but are not currently offered as standard accessories. However, ZERO BREEZE is actively developing additional window adaptation solutions, which will be available on our official website soon.

Yes, it is included in the Mark 3 package.

The Mark 3 measures 22" x 10" x 12", with a total volume of about 25 L, calculated from its longest, widest, and tallest points. It weighs just 22 lbs. Its compact size and lightweight design make it easy to carry and store.

The Mark 3 delivers a cooling capacity of 5,280 BTU, specifically engineered for targeted cooling in outdoor and off-grid environments.

The power consumption of the Mark 3 varies depending on the operating mode:

• Rocket Mode: 350–500W
• Cool Mode: 200–350W
• Sleep Mode: 150–200W
• Fan Mode: 12–17W
• Dry Mode: 350–500W
• Care Mode: 150–350W
• Heating Mode: 200–500W

The Mark 3 uses less than 100 grams of environmentally friendly R290 refrigerant, sealed inside the system for safe operation with no user handling required.

The Mark 3 is designed for personal and small-area cooling, roughly 100–150 sq. ft. when used indoors under typical home insulation conditions. However, outdoor environments like tents, vans, trailers or boats, generally have less insulation, which can reduce the effective cooling area.

For this reason, the Mark 3 is best suited for spot cooling and small, flexible spaces, making it ideal for outdoor and portable setups, providing efficient cooling exactly where you need it.

Yes, the Mark 3 has a heating mode. However, it is important to note that this function is designed as a supplementary feature, rather than a primary heating solution. Due to power limitations, the heating mode is only effective when the ambient temperature is above 50°F (10°C).

We recommend first using your primary heating system to raise the temperature to your desired level, and then using the Mark 3's heating mode to maintain that it.

Unlike traditional air conditioners with a reversing valve, the Mark 3 is designed without one to maintain its compact size, low weight, and power efficiency. This means the front always blows cool air, while the rear expels warm air—regardless of the mode. So, when using the heating mode, be sure to aim the rear of the unit toward the area you want to warm.

The noise level varies depending on the mode:

• Sleep Mode: ~46 dB (whisper-quiet, ideal for nighttime use)
• Standard Mode: ~50 dB (similar to a small fan)
• Boost Mode: ~55 dB (stronger cooling, slightly louder)

"Care Mode" is a specialized cooling mode designed to provide gentler, more comfortable airflow than standard cooling. It's perfect for spot cooling when you want relief from the heat—without the icy blast. So you stay cool without feeling like you're sitting in front of a freezer.

The Mark 3 features a dual-duct system, which uses two separate air pathways—one for intake and one for exhaust—located at the back of the unit. This design offers several benefits that improve cooling efficiency:

• Reduces negative pressure inside the room, optimizing airflow.
• Prevents unconditioned outside air from entering the space.
• Uses outside air for the condenser and expels it back out, ensuring more effective cooling.

As a result, the dual-duct system provides better cooling performance and enhanced energy efficiency compared to single-duct portable air conditioners.

• Front air outlet duct diameter: 11 cm
• Front air inlet duct diameter: 13 cm
• Rear air outlet duct diameter: 15 cm
• Rear air inlet duct diameter: 13 cm

Note: All ducts can extend up to 2 meters.

• Drainage pipe length: 150 cm

Yes, draining is required to remove condensation generated during operation.

Yes. The Mark 3 is equipped with multiple high-precision temperature sensors, strategically placed for accurate temperature control and efficient operation.

Yes, the Mark 3 has a built-in timer function, which can be set using the remote control and mobile app. Here's how:

• Press the Timer button on the remote control or within the mobile app.
• Use the + or – buttons to adjust the time (in 0.5-hour increments, up to 12 hours).
• Press the Timer button again to confirm. A “ding” sound and a steady timer icon will appear, indicating the timer is set.

Note: The Mark 3 itself does not have a physical timer button. This feature is accessible via the remote control.

Yes. The Mark 3 includes a 100V–240V AC adapter. When connected to a wall outlet, it can run continuously without a battery.

The Mark 3 has an EER of 10.56, demonstrating high energy efficiency for its size and output.

When plugged into a standard AC wall outlet (100V–240V), the Mark 3 can operate continuously, as long as it is properly maintained and in good working condition.

If running on Mark 3 battery power, the runtime depends on the selected mode and the number of batteries connected. Here’s a breakdown of the expected working time:

• Rocket Mode (350–500W):
• With one battery (1022Wh): 2–3 hours
• With two batteries (2044Wh): 4–6 hours

• Cool Mode (200–350W):
• With one battery (1022Wh): 3–5 hours
• With two batteries (2044Wh): 6–10 hours

• Sleep Mode (150–200W):
• With one battery (1022Wh): 5–7 hours
• With two batteries (2044Wh): 10–14 hours

• Fan Mode (12–17W):
• With one battery (1022Wh): 60–85 hours
• With two batteries (2044Wh): 120–170 hours

• Dry Mode (350–500W):
• With one battery (1022Wh): 2–3 hours
• With two batteries (2044Wh): 4–6 hours

• Care Mode (150–350W):
• With one battery (1022Wh): 3–7 hours
• With two batteries (2044Wh): 6–14 hours

• Heating Mode (200–500W):
• With one battery (1022Wh): 2–5 hours
• With two batteries (2044Wh): 4–10 hours

Yes! The Mark 3 app (currently in beta) is available for both iOS and Android:

• iOS: Download from the Apple App Store.
• Android: Click on the link to download via Google Drive: https://drive.google.com/file/d/1UPrSLkOEGyyw-pNXhRpLVOrXU17J_kJ7/view?usp=sharing

The "Power Input" port uses a custom 4-pin connector developed specifically for the Mark 3. For proprietary reasons, the detailed communication protocol remains confidential.

The battery runtime of the Mark 3 depends on the selected operating mode and how many batteries are connected. Here are the approximate runtimes:

• Rocket Mode (350–500W)
• One battery: 2–3 hours
• Two batteries: 4–6 hours

• Cool Mode (200–350W)
• One battery: 3–5 hours
• Two batteries: 6–10 hours

• Sleep Mode (150–200W)
• One battery: 5–7 hours
• Two batteries: 10–14 hours

• Fan Mode (12–17W)
• One battery: 60–85 hours
• Two batteries: 120–170 hours

• Dry Mode (350–500W)
• One battery: 2–3 hours
• Two batteries: 4–6 hours

• Care Mode (150–350W)
• One battery: 3–7 hours
• Two batteries: 6–14 hours

• Heat Mode (200–500W)
• One battery: 2–5 hours
• Two batteries: 4–10 hours

You can recharge the Mark 3 battery through several methods:

• Using Mark 3's AC adapter (charges to 80% in about 2 hours).
• Using another Mark 3 battery (via the built-in charging cable).
• Using solar panels (12–60V input; solar charging cable sold separately).
• Using a 12V car cigarette lighter (cable sold separately).

The charging speed depends on the power output of your charging source.

With the standard 500W AC adapter, the battery charges to approximately 80% in about 2 hours.

Yes. You can connect the Mark 3 AC unit to the battery using the built-in cable, and then plug the battery into a power source.

This setup allows you to recharge the battery while simultaneously powering the air conditioner.

No, the Mark 3 is not limited to its own battery. You have several options for powering it directly from AC or DC sources, including off-grid setups. It requires at least 500W of power and supports the following inputs:

• 110–240V AC using the Mark 3's AC adapter (available in our store)
• 48V DC using the Mark 3 DIY Cable (available in our store)
• 12V, 24V, or 36V DC using the ZERO BREEZE 48V Booster (available in our store)

Here are some common ways to power the Mark 3:

1. Direct 48V DC Input

If you already have a 48V power source (e.g., a LiFePO₄ battery bank), you can connect it directly to the Mark 3 using the DIY Cable (bare leads → D20).

2. Using the 48V Booster with 12V–36V Sources

If your source is 12V, 24V or 36V (such as a vehicle battery or certain power stations), use the ZERO BREEZE 48V Booster to step up the voltage. Required input current:

• At least 42A for 12V (≈ 500W)
• At least 21A for 24V
• At least 14A for 36V

3. Running from a Power Station

• If your station has a native 48V DC output, connect it directly via the Mark 3 DIY Cable.
• If not, use either the 48V Booster (from 12V/24V outputs) or the Mark 3's AC adapter via the power station's AC outlet.

4. Solar Charging + Battery Use

Charge the Mark 3 battery with solar panels using the Solar Charging Cable (MC4 → D20). Once charged, the battery can power the unit. You can also chain multiple batteries for extended runtime.

⚠️ Safety Note:When using third-party or DIY power sources, please exercise caution and ensure you have the appropriate electrical knowledge. Improper wiring or incompatible power supplies may cause damage or pose safety risks. If unsure, consult a qualified technician or electrician.

Yes. You can connect two or more Mark 3 batteries together using the built-in cables to extend runtime seamlessly.

No. When using multiple batteries chained together, the next battery will automatically take over when the first one is depleted. Therefore, you can sleep soundly without needing to swap batteries manually.

No. Each Mark 3 battery includes a built-in cable for direct connection to the Mark 3 unit—no additional cables are needed.

The Mark 3 battery is designed for over 1,000 full charge/discharge cycles at normal temperatures. After 1,000 cycles, it typically retains around 87% of its original capacity.

Setting up the Mark 3 is simple and doesn’t require complex installation. Just connect the Mark 3 to the Mark 3 battery or your own power source, then press the power button to turn it on. After that, enjoy the cool breeze!

Note: If you're using your own power source, ensure it provides sufficient output to power the Mark 3 effectively.

Whether or not ducts are necessary depends on your environment and setup:

• In open spaces: Ducts are not required, and you can use the Mark 3 to cool the area effectively without them.
• In enclosed spaces (such as tents, vans, or boats): We recommend installing the rear dual ducts to enhance cooling efficiency and improve ventilation.

For targeted cooling, you can also install the front air outlet duct in either case to direct airflow more precisely to the desired area.

The Mark 3's dual-duct system is flexible and can be adapted to various environments, including SUVs, vans, boats, trailers, and truck campers. Proper duct setup can greatly improve cooling efficiency by ensuring optimal airflow and ventilation.

Here are a few real-world examples from our customers to help guide your installation:

• SUV: https://www.facebook.com/share/p/1ANTSQtYix/
• Boat: https://www.facebook.com/share/p/1AR4CAjD9g/
• Trailer: https://www.facebook.com/share/p/1XcXtzfg9K/
• Minivan: https://www.facebook.com/share/p/1AMgyNJss5/
• Truck Camper: https://www.facebook.com/share/p/18Q4DKbVjv/

If you're unsure how to set up the ducts in your particular space or need personalized guidance, feel free to contact our support team at support@zerobreeze.com—we're happy to help you optimize your installation for the best performance.

• To clean the Mark 3:

1. Remove the filters.
2. Use a cloth or dust collector to clean the interior and any areas with accumulated dust.
3. After cleaning, reattach the filters.

• For storage, ensure the unit is placed in a dry, cool location, and keep it away from extreme temperatures.

The Mark 3 is covered by a warranty as outlined in the ZERO BREEZE warranty policy. For full details, please refer to the policy here: Warranty Policy.

Yes, we offer financing through Shop Pay and Klarna at checkout, allowing you to choose an installment payment plan.

You can find details about our return policy here: Refund Policy.

When purchasing the Mark 3, you automatically receive a 1-year warranty. However, you can extend your coverage by purchasing a 1-year, 2-year, or 3-year extended warranty via this link: Mark 3 Extended Warranty.

Additionally, we offer a 6-month extended warranty as a bonus for customers who register their product with the warranty card, ensuring long-term protection for your Mark 3.

Yes, we provide hero discounts for qualified individuals. Please fill out the form at the following link to see if you qualify: Hero Discount.

Yes, we have a local warehouse in the U.S. with Mark 3 units currently in stock. We may also have stock in other regions from time to time, although these warehouses are not maintained year-round.

If you're located outside the U.S. and wish to avoid potential customs fees, we recommend checking with our authorized dealers in your country to see if they have Mark 3 units available. You can find a dealer near you here: Find a Dealer.

The Mark 3 is an excellent choice for cooling various areas in your home. It can be placed in spaces such as bedrooms, kitchens, garages, pet rooms, or any other area that needs a cooling boost.

Note: The Mark 3 is most effective in spaces ranging from 100 to 150 ft².

Yes, the Mark 3 can be used in a car, but make sure to secure the unit properly so it doesn't shift while driving. Although it works well on flat roads, we don't recommend using it on bumpy roads as this could affect the operation of the compressor.

Absolutely! Many van owners find the Mark 3 ideal for creating a cool, comfortable space in their vehicles, especially for their sleep areas. With a 5,280 BTU cooling capacity, the Mark 3 is perfect for smaller, insulated areas (around 100-150 ft²). While it won't replace the main AC system in a larger cabin, it significantly enhances comfort in a localized zone.

For best results, we recommend parking in shaded areas, pre-cooling with your van's AC if available, ensuring good insulation, and using dividers to focus the cooling.

For setup inspiration, check out this DIY guide from a van owner: DIY Air Conditioner for Sprinter Van.