How to set up the Mark 3 dual ducts in my van?

Mark 3 uses front ducts for cool air in/out and rear ducts for hot air exhaust and circulation . To get the best results: Separate your sleeping/cooling zone with a partition. Vent hot air out of a window or toward the front of the van. Many users make a simple PVC board with two holes for ducts—this also keeps bugs out. 👉 Real World Setups for the ZERO BREEZE Mark 3 Portable A/C

portable ac for van

Name: ZERO BREEZE Mark 3 AC
Brand: ZERO BREEZE®
SKU: Z30+Z30B*2+K2036
Price: 2499.99 USD
Availability: InStock

Why Traditional Van AC Options Fail

We get it. It’s 2 AM. You’re sticky with sweat, your partner is tossing and turning, and the van feels like an oven even with the ventilation fan humming away. You've probably considered all the common options, only to run into the same old problems:

Rooftop AC

Costs over $5,000 with unit, install, batteries, and inverters. Heavy, complex, and hard to manage.

Some Portable Units

Bulky and heavy. They drain your house battery in 2–3 hours, leaving constant power anxiety.

Window AC

No stealth camping possible. Loud, visible unit hanging outside your RV door gives you away.

Mini-Split AC

Requires outdoor condenser, wall cuts, pro HVAC install—hardly portable and stealth-friendly.

Generators (Power Source)

They’ll run your AC, but noise, fuel storage, and campground restrictions make them inconvenient.

So you end up choosing between comfort and stealth, between sleeping and spending another night in a motel. But there has to be a smarter way to stay cool.

Meet the Mark 3: Your Personal Cooling Zone

The ZERO BREEZE Mark 3 Portable Air Conditioner is designed for life on the road. Unlike anything else, it runs entirely on its own 1022Wh battery pack, solving power anxiety and eliminating costly installs.

No Stressful Installation

Skip the $5,000 rooftop AC and weeks of downtime. There’s no roof cutting, no complicated wiring, and no professional installation needed. Unbox, vent, and sleep cool tonight.

Your House Batteries are Safe

Runs independently on its own battery for 5–7 hours, leaving your van’s electrical system untouched.

Stealthy and Silent

At just 46 dB in Sleep Mode, quieter than a library, it won’t disturb neighbors or give away your location.

True Portable

At 22 lbs, it’s easy to move between your sleeping space, workspace, or even outside your van.

$3,099.99 $2,499.99

Save $600

Shipping calculated at checkout.

Type

Mark 3 (AC + 2 Batteries)

Mark 3 (AC + 1 Battery)

Mark 3 Basic (AC Only)

View Mark 3 Series User Manual

Cooling Capacity	1550W/ 5280BTU
Heating Capacity	1700W/ 5800BTU
Working Mode	Rocket/Cool/Sleep/Fan/Dry/Care/Heating
Cooling Rated Input	500W
Wind Speed Level	4
Rated Working Voltage	48V DC
Working Voltage Range	38V-58.5V
Thermostat Setting	Cooling: 61℉-82℉/16°C - 28°C Heating: 64℉-88℉/18°C - 31°C Dehumidifying: 15% - 90% relative humidity
AC Adapter Input	100V-240V (50Hz/ 60Hz)
Ambient Temperature for Operation	50°F-104°F/10°C-40°C
Ambient Temperature for Storage	14°F-140°F/-10°C-60°C
Refrigerant	R290
Unit Size	22"L x 10"W x 12"H / 56cm x 26cm x 31cm
Weight	22lbs/10kg
Moisture Protection	IPX4
Ventilation Configuration	Dual Hose

Mark 3 Battery Specification

View Mark 3 Battery User Manual

Battery Type	21700 Lithium-Ion Polymer Battery
Net Weight	14lbs/6.4kg
Unit Size	20"L x 8"W x 4"H / 51cm x 21cm x 11cm
Capacity	1022Wh
DC Charge Input Voltage	12V-60V
Charge from 0% to 80%	About 2 hours (by official power adapter)
Safety	Short protection Over current protection Low voltage protection Over temperature protection
Chainable	Support 2, 3, 4, or more batteries chaining one after another
Operating Temperature	14°F-104°F/-10℃-40℃
Output Power Max	550W
Output Voltage	42V-58.8V
12V Anderson Output	12V/10A Max(120W)
USB Type C	PD(100W Max)
USB Type A	QC 3.0 18W
Charging Method	Power adapter from the wall outlet Solar Panels Cigarette Port
Charging Limited Current	10A
Charging while discharging	Yes

ZERO BREEZE Mark 3 Air Conditioner × 1

50V DC Power Adapter for Wall Outlet × 1

2.4G Wireless Remote Controller × 1

Drainage Pipe × 1

Front Outlet Duct × 1
Φ4.33″ (11 cm)

Front Inlet Duct / Rear Inlet Duct × 1
Φ5.12″ (13 cm)

Rear Outlet Duct × 1
Φ5.91″ (15 cm)

Front Inlet Adapter × 1

Front Outlet Adapter × 1

Rear Inlet Adapter × 1

Rear Outlet Adapter × 1

ZERO BREEZE Mark 3 User Manual × 1

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Real Vanlifers, Real Sleep

Don't take our word for it

"One of the best investments and additions to the van since the 4 years I've been living in it! NO GENERATOR, NO JANKY WINDOW UNIT HANGING OUT THE BACK WINDOW. SOLAR POWERED 48V COOL AIR... Does it allow you to have a comfortable evening and sleep well??? YESSSSS!!!!!"
@outwandering333
Ford Econoline E250

"It was a lifesaver in Sacramento last week! It 'spot' cooled me on the bed AND cooled down the entire van enough to be comfortable...Your air conditioner has saved me from having to rent a hotel."
Linda J. Will
Ram Promaster 2500

"We are having very hot days here in Las Vegas with temps around 110° and it still does an acceptable job of cooling while parked in the hot garage with no sun beating down on the camper."
George W. Hardesty
Sienna Minivan

★★★★★
"This was my choice over a rooftop A/C and costly lithium battery upgrades — and I’m glad I went this route. The hoses and connections are solid, and the setup is simple. Definitely worth the wait!"
Cindy M. Foster
Class B Ram Promaster Hymer Aktiv

★★★★★
"The Mark 3 makes summer van life bearable, especially in places like Idaho. Just remember to vent it properly, since it does put off heat from the back...Definitely a great product for vanlifers."
Jason Biscuit Davis
Van Life Traveler

★★★★★
Even with a 30k BTU system, the front of our Class A still gets hot. The Mark 3 adds that extra spot cooling we needed up front — exactly the little boost we were looking for.
Patrick Hughes
Class A Van

Perfect For:

Weekend Warriors: Occasional cooling without big investment

Remote Workers: Cool workspace + sleep area

Stealth Campers: No visible roof modifications

Renters: No permanent van modifications

Pet Owners: Keep furry friends comfortable

Let's Be Honest: What This ISN'T

The Mark 3 is not a whole-van cooling solution. It's designed for personal cooling zones - think sleeping area, workspace, or driver's cabin.

It won't:

Cool your entire van like a house AC
Work efficiently in poorly insulated vans
Run indefinitely without recharging
Replace a full RV system for large Class A motorhomes

It will:

Keep you comfortable where you sleep and work
Give you 5-7 hours of cool air without touching your house battery
Set up in under 10 minutes with zero modifications
Run quietly enough for stealth camping

Mark 3 Runtime Calculator

See how long Mark 3 can run on your battery / power station / DC system.
One Mark 3 Battery = 1022 Wh capacity.

Power Source

Capacity Type

Capacity (Wh)

Quick presets

AC Mode

Mode

Result

—

Estimates only. Real-world runtime varies with ambient temperature, compressor cycling, wiring losses and battery aging.

FAQs

Yes, with a 12V–48V booster or inverter. [Learn more: Power Options for ZERO BREEZE Mark 3]

About 2 hours to 80% with a 500W input. Works with wall outlets, car lighter, shore power, DC outlet, or solar. [Learn more: 5 Simple ways to charge ZERO BREEZE Mark 3 Battery]

Mark 3 uses front ducts for cool air in/out and rear ducts for hot air exhaust and circulation. To get the best results:

Separate your sleeping/cooling zone with a partition.
Vent hot air out of a window or toward the front of the van.
Many users make a simple PVC board with two holes for ducts—this also keeps bugs out.

👉 Real World Setups for the ZERO BREEZE Mark 3 Portable A/C

If you’re not satisfied, you can return the Mark 3 within 30 days. 👉 Learn more about our return policy

Mark 3 Air Conditioner ×1

50V DC Wall Power Adapter ×1

Wireless Remote ×1

Drainage Pipe ×1

Front Outlet Duct (Φ4.33") ×1

Front/Rear Inlet Duct (Φ5.12") ×1

Rear Outlet Duct (Φ5.91") ×1

Matching Adapters ×4

User Manual ×1

Yes. That’s about the sound of a library. Users say they barely notice it in Sleep Mode.