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Zero Breeze Mark 2 Review – My Thoughts After 1 Year Of Use

Ile Kauppila

Written By

Ile Kauppila

Expert Reviewed By

Josh Mitchell

Last Updated On

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In August of last year, I decided to buy Zero Breeze Mark 2 to help with the blazing summer heat.

As someone who spends a lot of time camping with the family, I needed something reliable and robust, and Mark 2 seemed like a good choice from the get-go.

After more than a year of hands-on experience with this portable AC, it's time to share my thoughts, discuss the performance, and highlight its pros (and cons) in this thorough Zero Breeze Mark 2 review.

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Zero Breeze Mark 2 Review Summary

4.2

Overall Score


Ease Of Use

4.5

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Cooling Ability

4.0

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Value for Money

4.0

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Why choose the Zero Breeze Mark 2?

  • Ideal for personal cooling and cooling small spaces, like truck cabins, camper van bedrooms, and tents.
  • Built to handle dings, scratches, drops, and light rain, it is perfect for heavy-duty outdoor use.
  • Notably quieter compared to other portable air conditioners.
  • Lowers the temperature better in humid conditions than evaporative coolers.
Pros
  • Consumes up to 220W, which is less than it is rated for
  • Provides excellent spot cooling even in extreme conditions
  • Lighter than most of the competitors in this price range
  • “Sleep Mode” operates at near-50 dB, making it extremely quiet and pleasant for sleeping
  • Extremely rugged and durable - made to withstand water and rough handling
  • Does not create a lot of condensation in average-humidity conditions
CONS
  • Battery charge time is slow - 6 hours for 100%
  • Battery connector cable may be hard to thread if you have bigger fingers
  • Expensive add-ons and accessories

Key Features Of The Zero Breeze Mark 2 Portable AC

Feature

Details

Cooling Power

2300 BTU

Battery Capacity

840Wh

Battery Runtime

Up to 7 hours (in Sleep Mode)

Weight (without battery)

16.5 lbs

Weight (with battery)

28.5 lbs

Dimensions

20" x 10" x 11"

Cooling Modes

Rocket, Cooling, Sleep, Fan

Exhaust Configuration

Dual Hose

Sound Level

50-59 dB

Warranty

1-year

ZeroBreeze Mark 2 specs

Who Is Zero Breeze Mark 2 Ideal For?

Zero Breeze Mark 2 is designed with specific people in mind, and if you ask me, Mark 2 is ideal for:

Truck drivers

Zero Breeze Mark 2 provides excellent direct cooling while driving. It prevents sweat from dripping into your eyes and eliminates the need for a towel or constant shirt changing.

As it will replace your AC, It will also lower the fuel consumption by a gallon per hour, potentially saving you upwards of $30 per day.

It excels at cooling you and the sleeper cab at night, allowing for a great night's sleep.

Outdoor Enthusiasts and Campers

Zero Mark 2 is powerful enough to provide direct cooling from 3-6 feet away while camping, barbequing, or just lounging in the woods.

It provides a chilly breeze that can offset the scorching sun even in 100-degree weather.

During the night, Mark 2 excels at cooling small and average-sized camping tents up to 40 sq ft, with up to 3 people inside. 

In "Sleep Mode," you can expect a 10-degree drop in temperature, in addition to the direct cool breeze, lasting up to 6 hours on a full battery.

Nomads in Campers and RVs

Zero Breeze is an effective solution for nighttime cooling if your camper or an RV has a small designated sleeping space or if you are out in the woods, without a generator, unable to power the vehicle's AC all night.

Like with tents, you can expect a noticeable drop in temperature lasting until morning.

Handymen

Mark 2 is an effective personal cooling solution for handymen who spend a lot of time in sheds or garages without dedicated ACs.

It is also an excellent choice for those looking for an easy-to-carry portable air conditioner they can take with them if they are out on a task.


Why Buy Zero Breeze Mark 2? My Thoughts After 1 Year Of Use

After going through dozens of camping trips, one cross-country RV expedition, and countless hours in my shed, here is why you should purchase Zero Breeze Mark 2.

Brilliant at Direct and Small-Space Cooling

TL;DR: It effectively cooled me down, even in 105-degree weather.

What I noticed a lot of people fail to understand is that Zero Breeze Mark 2 isn’t an AC unit like you’d find in your home. Instead, think of it as a supercharged personal cooler with 2300 BTUs.

The air Mark 2 spews out at you can be as chilly as 50 degrees in the right conditions (for example, at night).

However, what I found more impressive is that it blows 70-degree cold air even when placed in direct sunlight in 105-degree weather.

That is the difference between being drenched in sweat and being completely dry and cozy, without the overbearing “cold” you’d feel if you blast the engine-driven AC from your truck, van, or car.

What I want to get into now is working modes, which Mark 2 has four:

  • Cool: Cooling mode, good for immediate or small-space cooling in 80-85-degree weather.
  • Fan: Fan-only mode, good for recirculating air, but not effective for cooling.
  • Sleep: Quiet, low-fan mode, ideal for nighttime use, as it is quiet enough to fall asleep next to.
  • Rocket: Supercharged cooling mode - ideal for cooling in 90-plus-degree weather.
As for small spaces, I can personally testify to Mark 2 cooling down my 40-square-foot tent to 70 degrees on an 80-degree summer evening in an hour.

I had to use it in "Rocket Mode" to get there, but once it was cold enough, I switched it over to "Sleep Mode," which was able to lower the temperature to 65 degrees once the outside temperature dropped to mid-70s.

To give you a better perspective of what this thing can do overall, let’s crunch some numbers, and see how much can Mark 2 cool different-sized tents at different temperatures.

Tent Sq. Ft./Outside Temperature

100°F

90°F

85°F

80°F

75°F

25

10°F

15°F

20°F

25°F

25°F

30

5°F

10°F

15°F

20°F

25°F

40

/

5°F

10°F

10°F

15°F

One thing I like a lot about Mark 2 is the “Sleep Mode” for two reasons.

  • “Sleep Mode” is powerful enough to keep the temperature steady.
  • I can “Sleep Mode” all night long without the noise disrupting my sleep.
Now, as far as vehicles are concerned, you will get to enjoy personal, direct cooling.

On average, you're looking at a 30-degree difference between the outside air and the air blown from the Zero Breeze Mark 2. This makes a world of difference, especially in the 100-plus-degree weather.

You Can Power It In So Many Ways

TL;DR: You can save some money and shop for Mark 2 without the battery - if you own a battery pack or power station.

You can power the Zero Breeze Mark 2 in eight different ways, but not all of them are created equal.

In reality, it’s 6, maybe 7 different powering methods, depending on how you want to separate them.

Full disclosure:

I haven't tested all of these methods out, but those I did worked flawlessly for me. Nevertheless, here's all you need to know about powering the MK2.

  1. 1
    Using the MK2 battery:
    This is the most basic method, and it will provide you with 3-8 hours of cooling on a single charge, depending on the mode.
  2. 2
    Using two MK2 batteries in parallel:
    Connecting the two batteries with a power extension dock will double the battery life, giving you 6-16 hours of cooling, depending on the mode.
    However, it will cost you an additional $699 for the extra battery and $129 for the dock.
  3. 3
    Using two MK2 batteries with an AC/DC 240W adapter:
    If you intend on buying two batteries and a dock, this will allow you to run the MK2 unit for as long as you have access to AC power, simultaneously charging the batteries and powering the unit.
  4. 4
    Using an MK2 battery with a car cigarette lighter:
    A convenient option, although not always a feasible one, due to wattage output restrictions of cigarette lighters (they usually cap out at 120W).
  5. 5
    Using two MK2 batteries with solar power:
    This is a great option if you have a camper equipped with solar panels. However, there is a bit of tinkering involved depending on the solar panels you have, primarily pairing their voltage and wattage. It's not an option I tested as I don't have solar panels, but if you do, this would be the most cost-effective option.
  6. 6
    Using two MK2 batteries with a 12V battery bank charging:
    A good option if you need 12+ hours of runtime for your MK2. Essentially, this simulates the AC charge/discharge option, only with a runtime limited by your battery bank's capacity.
  7. 7
    For a 2000W battery, you're looking at around 22 hours of runtime; a 3000W battery would be closer to 32 hours.
  8. 8
    Using a 12V power bank:
    In my opinion, using a power bank and one battery is the best approach for maximizing MK2 runtime without overspending. If you own a 2000-plus-watt power bank, you could get around 12 hours of runtime from your Mark 2 in "Rocket Mode." In "Sleep Mode," you could realistically expect more than a day. I've run my MK2 off of a separate battery only on several occasions, as I found that the included battery provided good runtime for my needs.
  9. 9
    Using an ElecHive Portable Power Station:
    ElecHive is a high-capacity power station Zero Breeze sells that can provide up to 25 hours of cooling on a single charge. In other words, it is the same as the previous option, only with Zero Breeze's $2199 battery bank and $24.95 connection cable.

I powered my Mark 2 the simplest way - with its included battery.

This is the easiest and most convenient way, as the entire thing becomes one seamless unit you can run for up to 6 hours. 

The battery snaps on at the bottom and connects to the Mark 2 unit via a simple (included) cable, and it's good to go. The cable should be fastened, which may be a tiny issue if you have meaty fingers.

The only “issue” with this one is recharge time, so I wouldn’t recommend this approach if you intend to use your MK2 for an entire day. 

If you do, you’ll be left with no air conditioning for 6 hours while your battery charges back up (if you have an outlet to charge it back up).

For those whole-day cooling scenarios, you can use a separate power station or a power bank (Method 7).

One thing to keep in mind is you'll need to grab a 12V to 24V converter from Zero Breeze for $99, as most power stations are 12V, and Mark 2 takes 24V.

If you want a dozen hours of extra runtime, this is a good investment.

Now, if you’re looking for an “unlimited-runtime” setup, say in a garage or a shed, you’d need to buy two batteries and keep your MK2 powered from an outlet (Method 3).

ZeroBreeze Mark 2 Solar Charging

It Is Lightweight and Extremely Portable

TL;DR: It is the lightest portable air conditioner I ever owned at just 16 lbs.

Firstly, everything about the design of Mark 2 is tailored for portability and flexibility of use.

It's lightweight, and its top looks like a carrying handle that isn't retractable, so it is extremely durable and sturdy.

What I like about this design is that I don’t have to use both hands to lift up the MK2 in the trailer of my truck or into my car trunk. I just pick it up with one hand and place it wherever.

Now, the weight and dimensions are simply incredible. 

Zero Breeze Mark 2 Dimensions

To put this into perspective, here’s how MK2 compares to other portable air conditioners in terms of both weight and dimensions:

Unit

Weight

Weight with Battery

Dimensions

Zero Breeze Mark 2

16.5 lbs

28.5 lbs

20 x 10 x 11 in

EcoFlow Wave 2

32 lbs

48.5 lbs

20.4 × 11.7 × 13.2 in

Vremi 12000 BTU

56.2 lbs

/

13.78 x 16.54 x 27.17 in

As you can see, its dimensions are very compact. It is both shorter and slimmer than any other portable AC on the market.

The entire MK2, with the battery attached, can fit on a passenger’s seat (or in the leg space in front of it) or in a tent without taking up any precious real estate if things get crowded.

Whenever I was camping alone, I kept my Mark 2 inside the tent as it took up less space on the floor than my camping backpack.

It Is More Durable Than It Looks

TL;DR: I accidentally left it out in the light rain overnight - and it still works perfectly.

Zero Breeze Mark 2 is built to last.

Truth be told, I haven’t handled it with care as much as I should have, but thankfully, Zero Breeze had people like me in mind.

I can’t tell you how many times I’ve dinged my unit or forgotten to secure it in the trunk so it went flying.

It even survived a nighttime drizzle for more than a few hours because I didn’t hear it was raining. And after all that, the unit still works perfectly.

It has some minor scratches here and there, which is to be expected, seeing how this one’s made from ABS plastic.

ABS is known for its remarkable impact resistance, as well as stability and toughness under heat. It also withstands chemical and abrasive elements with ease.

Even in low and high temperatures, ABS remains hard and rigid, making it a reliable material for outdoor equipment.

Additionally, ABS comes in specialized grades that can be fire-retardant or heat-resistant, although I’m not sure if Mark 2 uses these.

Another thing I also like is the IPX4 rating, which guarantees protection from water (splashes and spills) as long as the unit is not submerged.

In other words, Mark 2 is water-resistant and can handle light-to-moderate rain without any issues. 

So don’t rush frantically to move it someplace dry when it inevitably starts drizzling while you’re camping.

That said, if it’s pouring rain, don’t risk it.

It Can Actually Save You Money

TL;DR: You could run it for 24 hours straight for $1.30.

Depending on whether you’re driving a truck, van, camper, or RV, your built-in AC can use a gallon of gasoline or diesel in 1-2 hours.

Mark 2 draws anywhere from 130 to 220 watts per hour - 130 in Sleep and 220 in Rocket.

To help you gain a better understanding of how can a portable AC save you money, take a look at this table, assuming average fuel/electricity consumption in 95-degree weather:

 

Fuel/Power Consumption

Cost per Gallon/kWh

8-Hour Running Cost

Truck

1 gal/hr

$3.25

$26

RV

0.5 gal/hr

$3.25

$13

Mark 2

0.275 kWh

$0.16

$0.44

In other words, if you’re a truck driver or someone who lives outside an RV or a camper van - you could pay off the initial cost of Mark 2 in 3-6 months with the cost savings.

It Is Surprisingly Quiet

TL;DR: It’s like having a white noise machine that keeps you cool.

Zero Breeze Mark 2 Noise Level

If you’ve ever used a portable air conditioner, no matter the kind, you know that they’re usually a lot louder than advertised. Surprisingly, I haven’t found that to be the case with Mark 2.

My unit never got above 60 dB - not even in scorching heat, running on full blast in "Rocket Mode."

I have it set up in my camper so that it sits 4 feet away from me while I’m driving, blowing directly into my torso, and while I do hear it - I tune it out in a few minutes.

More importantly (at least for me), the Zero Breeze Mark 2 is very quiet in "Sleep Mode." 

I can easily fall asleep next to it in the tent, even though I'm only a few feet away.

If you keep it outside the tent with only the air outlet hose being in your tent (as I usually do on a clear night), Mark 2 is barely audible. I tried to measure the dBs when I had it outside, but it wouldn't pick up on it.

That said, here are the noise levels I measured from 4 feet away:

 Mode

Noise Level

Rocket Mode

58 dB

Cooling Mode

55 dB

Sleep Mode

51 dB

To put this into perspective, 50 dB is a quiet library or humming of a laptop, meaning you can hear MK2 in “Sleep Mode” ONLY if you decide to focus on it. Otherwise, you’ll tune it out in minutes.

Setting It Up Is Easy

Setting Up Zero Breeze

TL;DR: My record setup time was 57 seconds.

As there are two types of Mark 2 "setup," I wanted to break it all down for you.

Setting Up Mark 2 For Camping

It takes about two minutes to set up a Zero Breeze Mark 2 if you want to cool down a tent or use it as a personal cooler while you’re grilling by the campfire.

Here’s how you do it:

  1. 1
    Attach the front air outlet duct connection adapter to the front and the venting hose connection adapter at the back. Thread the included screws for secure attachment.
  2. 2
    Insert the intake and exhaust venting hoses in the connection adapter in the back, and insert the front air outlet duct in front.
  3. 3
    Insert the drainage pipe into the drainage outlet in the back. Keep the unit above ground so it can drain properly.
  4. 4
    Place the MK2 onto the battery until it latches on, and use the cable to connect the battery and the unit. Thread the cables for added security.
  5. 5
    Start the Mark 2.

All of this shouldn’t take more than 5 minutes, with the majority of the time being spent on threading the screws.

After the initial setup, every other time, you should be all done in a minute.

Setting Up Mark 2 As A “Permanent” Cooling Solution (In a Truck or Camper)

If you want a “permanent” (or even a semi-permanent) cooling solution in a truck or a camper cabin, you will have to spend some time troubleshooting the best way to drain the condensate and where to run the hoses.

You can follow the initial 5-step guide from above for starters, but after you do, do the following:

ZeroBreeze Mark 2 Placement
For A Truck
  1. 1
    Secure the Mark 2 to the truck’s cabin floor.
  2. 2
    Run the condensation pipe down the weather seal or door jam for constant drainage.
  3. 3
    Route the exhaust and intake hoses through the pressure release valve (usually behind the front trim panel) of your truck. That way, you won’t have that same hot exhaust air coming back into the vehicle.

Alternatively, you can use the foam “window mounting kit” you get in the box. 

This is essentially a piece of foam with two circle-shaped holes pre-cut to fit the exhaust vents that you can cut to the shape of your window and create an airtight seal.

It's useful; it's a nice touch, but I wouldn't call that a go-to solution for a truck, especially if you intend to use Mark 2 non-stop, as it blocks the view from the window. While an effective solution, it's not an eye-pleasing one.

ZeroBreeze Mark 2 for Cars and Trucks
For A Camper/RV Bedroom

If you’re looking to use MK2 as your nighttime cooling solution in your camper or an RV, do the following.

  1. 1
    Follow the first setup tutorial.
  2. 2
    Use the included window mounting kit to route the intake and exhaust hose out of the camper/RV window.
  3. 3
    Find a suitable place to drain the condensate (either outside of your vehicle or into a drain bucket).

One thing I will say regarding the condensation that comes out of the Mark 2 is that it is virtually non-existent in dry climates.

Unless the air humidity exceeds 50%, you won't see more than a few milliliters of condensate over 4 hours.

It Requires Minimal Maintenance

TL;DR: Wipe it clean and vacuum once every two to three months.

Cleaning the Zero Breeze Mark 2 is a breeze (excuse the pun).

I've read other buyers suggest that zero maintenance is required, but in my experience, quickly doing the following 3 things will help this AC perform at its peak:

  1. 1
    Wipe the exterior: Every two weeks (or if you're camping regularly, after every other camping trip), use a damp cloth and mild detergent to wipe the exterior clean. Feel free to use the same damp (not wet) cloth to clean the front louvers.
  2. 2
    Clean the hoses: Intake and exhaust pipes can get dirty - especially the intake vent. If you notice any debris or dirt build-up, wash it and wipe it clean. Do the same for the outer portion of the hoses to prevent yellowing or stains.
  3. 3
    To prevent this from happening on camping trips, feel free to use a debris filter.
  4. 4
    You don't have to buy these, you can just DIY it using a piece of mosquito net or something similar.
  5. 5
    Vacuum the coils: Every 2 to 3 months, use a vacuum to suck out any dirt or dust that might’ve latched onto the coils. If you’re frequently using the Mark 2 outdoors or if you got caught in the bad weather, feel free to do this as often as you’d like.

The only thing I'm not super excited about is the fact that you can't quite access the coils. 

It is quite hard to open up the MK2, as the unit is not meant to be opened. So, simply vacuum through the louvers.

It Offers Excellent Value for Money

TL;DR: It is pricey but worth every penny.

In my opinion, Zero Breeze Mark 2 offers excellent value for money for its $1499 price tag.

While it is more expensive than common portable air conditioners (even compared to the same type of portable ACs, like EcoFlow WAVE 2), Mark 2 offers much more functionality and portability.

For example, the Vremi 12000 BTU portable AC I used for comparison earlier can't be used for personal cooling while driving.

Also, due to its 1350W power consumption, it is impossible to run for more than two hours while you're out camping, even if you have a massive battery pack or a power bank.

In contrast to EcoFlow, Mark 2 is much lighter, smaller, and easier to move around, so despite the $200 price difference in EcoFlow’s favor - MK2 does offer unique benefits if you’re looking for portability first.

What's most impressive about MK2, in my opinion, is its resale value. 

From what I can see, used Mark 2 air conditioners in good condition sell for $1000-1100. This means two things:

  1. 1
    Mark 2 retains its value over time, which protects your investment.
  2. 2
    Mark 2 is reliable, durable, and long-lasting, considering how well it sells even if used.

On top of all those things, the biggest selling point for me was the long-term cost savings if you use it for direct cooling while driving.

As I explained earlier, you’re looking at $25 of daily savings if you’re someone who drives a truck for a living.

Depending on how long and how often you drive, you’ll have Mark 2 paid off in several months.


Comparing Previous and Future Models of the Zero Breeze

With Mark 3 set for release in April of 2024, we are about to see the 3rd iteration of Zero Breeze portable air conditioners.

That said, let’s compare the Mark 2 to its successor and predecessor.

 

Mark 1

Mark 2

Mark 3

BTU

1100 BTU

2300 BTU

5280 BTU

Cooling Coverage

Up to 25 sq ft

Up to 40 sq ft

Up to 150 sq ft

Battery Capacity & Runtime

477Wh, for up to 5 hours

840Wh, for up to 7 hours

1036Wh, for up to 7 hours

Weight

12 lbs

16.5 lbs

19.8 lbs

Noise Level

Up to 68 dB

As low as 50 dB

As low as 44 dB

Modes

2

4

7

Price

Discounted

$999.00

$899 (presale), MSRP $1299

Mark 1 was not the most stellar product, but then again, it was Zero Breeze's first attempt at a portable air conditioner such as this one.

I haven't personally used the Mark 1, but from what I've heard from people who have, they weren't entirely happy with it.

Even as a personal cooler, Mark 1 just wasn’t powerful enough. The cooling capacity was just too low to make any difference in a real-world setting - especially if the temperatures were above 90 degrees.

I also heard that MK1 wasn’t the best for sleep, either. It wouldn’t be as quiet as you needed it to be, and considering it wasn’t strong enough to cool you down properly, many people gave up on it.

Thankfully, Mark 2 managed to solve all of these issues (and more), so it is likely that Mark 3 will be an improvement over Mark 2.

As you can see from the table above - Mark 3 is poised to be a much beefier unit with 2.5x more cooling capacity. This is the biggest and most impressive improvement from what I can see, as tripling the cooling area would make Mark 3 much more versatile.

Also, it would appear that the Mark 3 would operate at an even lower noise level when you put it in "Sleep Mode," which is nice.

Mark 3 will also sport three additional working modes:

  • Dry Mode
  • Care Mode
  • Heating Mode

So, unlike Mark 2, Mark 3 will be able to dehumidify the space, heat it up, and maintain the temperature using a thermostat, which will be included with the Mark 3.

On paper, all of this seems incredibly impressive. However, if experience has taught me anything - it’s to wait and see.

No one has tested or used the Mark 3. Apart from a few videos from the Zero Breeze guys, we don't know anything about Mark 3, so who knows if it will live up to these massive promises.

That said, as far as I’m concerned - Mark 2 is still the portable air conditioner to buy.

It was proven, time and time again, to be reliable, durable, quiet, and, most importantly, effective.


Warranty, Return Policy & Shipping

The Zero Breeze Mark 2 comes with a one-year limited warranty. The warranty covers manufacturing defects in materials and workmanship.

In other words, if your unit malfunctions within the warranty period, ZERO BREEZE will repair or replace it free of charge.

However, this is for the contiguous US only - which also applies to returns and refunds.

Returns and full refunds are accepted within 30 days of delivery.

There could be a 20% restocking fee if the original packaging is missing or damaged. The product must be in good condition, free of cracks, dents, scratches, etc., for the unit to be eligible for return.

Refurbished units, second-hand units, units bought outside of the Zero Breeze website, or even those won in giveaways are not eligible for returns and are not covered by warranty, so keep that in mind.

The thing I like the most about Zero Breeze's warranties is that you can also purchase an extended warranty - Mark 2 Care+ - within 30 days of receiving your Mark 2 AC or at the time of shopping.

You could opt out for a 1, 2, or 3-year long extended warranty.

In fact, I bought mine (and I feel like you should, too), as the 3-year extended warranty for just $179. It will protect your investment if you're rough and kind of careless with your unit, as I am.

Contiguous US states are the only ones to enjoy free shipping for Mark 2.

International shipping comes at a cost, dictated by the actual product and the destination country.

To find out the shipping cost for you - check out Zero Breeze’s shipping policy page.


Common Problems & Troubleshooting

I haven’t had any issues with my MK2 during the entire time I had it. It has worked flawlessly in every scenario, so I’m more than pleased with this.

However, just because I haven't had any doesn't mean other people didn't, right?

Actually, I haven’t seen anyone complain about the issues with the Mark 2.

From my own experience and from what I've read online, Mark 2 doesn't have issues with the compressor; the fan isn't loud, it doesn't make strange noises, the unit doesn't cycle on and off, and the battery is good and long-lasting, etc.

However, I see horrendous reviews and bad grades where people complain that the Mark 2 can't cool their space as efficiently as they thought it would.

Some have installed it in their RVs, expecting it to replace their dedicated AC, but of course, it failed to do so.

As I said several times, this is not an AC you use to cool down an entire room, cabin, or a large vehicle in the summer heat.

If you use Mark 2 in a way it is not intended to be used - it won't work properly. But that's not on the unit - that's on the user.

All that said, I do have a decent idea of what minor hiccups or issues one might encounter, which will mostly relate to:

  • Power Delivery
  • Leaking Condensate

Essentially, suppose you try to connect your MK2 to a third-party power source without checking the voltage of the power bank.

In that case, there's a good chance the unit won't start, or it will perform poorly.

Why? Because most external power banks are 12V, and MK2 takes 24V.

Therefore, please make sure you use a 12V to 24V converter when necessary.

Also, while the MK2 produces only a little bit of condensate in average humidity, there’s still a chance your unit might leak if positioned improperly.

To avoid leakage, simply lift the front end of your Mark 2 by 1-2 inches so that the gravity can help the water run out through the drainage pipe.

Now, just because I haven’t run into any issues, doesn’t mean no one ever will. Thankfully, Zero Breeze does have a support team that will answer any of your questions and address your concerns.

There is even a troubleshooting form you can fill out (for every Zero Breeze product, including cables and accessories) and explain your issues.

Provide pictures or videos, and the expert team will have a tailor-made solution provided to you in about 24 hours.

Zero Breeze Troubleshooting Ticket

Are Any Accessories and Add-Ons Worth It?

Here is a list of all the Mark 2 accessories (the ones in bold come in the box):

  • ZERO BREEZE MARK 2 AC Portable Bag
  • 12V to 24V Converter
  • Power Extension Dock
  • 100W Solar Panel
  • ZERO BREEZE Mark 2 Battery
  • Front Air Inlet Duct Connection Adapter
  • Infrared Remote Extender Cable
  • Solar Panel cable for Mark 2 Battery
  • AC/DC Adapter
  • DIY Cord with GX16-4 Connector
  • Cable for Connecting Mark 2 AC and Mark 2 Battery
  • Cable for ElecHive to Mark 2
  • Cable for Ecoflow to Mark 2
  • Cable for Goal Zero to Mark 2
  • Cable for BLUETTI to Mark 2
  • Venting Hose
  • Air Outlet Duct
  • Duct Connection Adapter
  • Venting Hose Connection Adapter
  • Drainage Pipe
  • Remote Controller
  • Screw for Connection Adapter

In addition, there’s the Mark 2 Care+ extended warranty I previously discussed.

As you can tell, this list is very extensive since Zero Breeze sells every single thing you need to connect, install, or power up the Mark 2 in any of the 8 ways mentioned above. 

I genuinely like this, as it saves time on research and streamlines the entire process.

On the other hand, this allows Zero Breeze to charge a premium for these additions, which they do, as most of the accessories are objectively overpriced.

What's even worse is that some are also completely unnecessary, such as the $200 portable carrying bag or a remote extender cable.

In my opinion, the only accessories you can genuinely benefit from are the following:

  • 12V to 24V Converter - if you plan on using a third-party power bank.
  • Power Extension Dock - if you want to use two batteries and simultaneous charge/discharge.
  • ElecHive Cable - if you want to use the ElecHive power station to run Mark 2.
While these are also priced quite high, I wouldn’t suggest getting third-party ones.

The quality with third-party accessories could be an issue, and you wouldn’t want to risk permanently damaging a $1500 AC for $50 in savings.


Who Is Zero Breeze Mark 2 Not For?

While I thoroughly enjoy my Mark 2 - two types of people simply can’t benefit from this product.

  • People looking to effectively cool down their entire RV or very large camper van.
  • People looking for an indoor portable air conditioner for an apartment, bedroom, entire office, house, etc.
Zero Breeze Mark 2 isn't designed to chill large spaces. 

It is designed to provide direct cooling and chill smaller areas up to 40 square feet, which, in terms of living space, is not enough to fit a king-sized bed.

You can get much larger and more powerful portable ACs for a fraction of the price of Mark 2, which are designed for cooling down large rooms, big garages and workshops, and/or entire homes or apartments.

What's also important to note is that your vehicle's AC is anywhere between 12,000 and 20,000 BTU - which is nearly 10 times the cooling power Zero Breeze Mark 2 has.

Therefore, while you can use Mark 2 to cool yourself while in a truck, RV, or camper, you shouldn’t expect it to chill the entirety of the vehicle, as it simply isn’t designed to do so.


FAQs

How Long Does It Take For The Zero Breeze Mark 2 Battery To Charge?

It takes approximately 6 hours for a Mark 2 battery to charge fully.

Can You Run Zero Breeze Mark 2 Overnight?

Yes, you can run Zero Breeze Mark 2 overnight, as long as there's enough power to last through the night. For instance, running two Mark 2 batteries simultaneously could easily last an entire night plus the morning.

Can You Use Zero Breeze Mark 2 Without The Battery?

Yes, you can use Zero Mark 2 without the battery, but you must use a separate power source, like a power station, to run the Mark 2.

Can You Power Zero Breeze Mark 2 From Your Vehicle’s Cigarette Lighter?

It is possible, but not very likely, that you could power the Zero Breeze Mark 2 with your vehicle's cigarette lighter. Mark 2 requires a stable power input of 300W (or at least 250W), and most cigarette lighters can't output more than 180W.

Does Zero Breeze Mark 2 Need Draining?

Yes, Zero Breeze Mark 2 requires constant draining and does not evaporate the condensate.

Can You Use Zero Breeze Mark 2 Outdoors?

Yes, you can effectively use Zero Mark 2 outdoors, as long as you have it pointed directly at you from a distance of no more than 6 feet.

What Refrigerant Does The Zero Breeze Mark 2 Use?

Zero Breeze Mark 2 AC uses R134A refrigerant - a common HFC refrigerant with a relatively low environmental impact compared to older refrigerants like R12.

Does Mark 2 Need To Be Filled With Water Or Ice?

No, Mark 2 does not need to be filled with water or ice as it is not an evaporative cooler.

Final Verdict: Is Zero Breeze Mark 2 Worth It?

After more than a year with it, it is obvious to me that Zero Breeze Mark 2 is worth it.

Mark 2 is absolutely one of my best investments, and I’m sure if you enjoy an outdoorsy lifestyle or if you’re always behind the wheel - it would be for you, too.

Mark 2 is a well-performing, well-built, and even better-designed portable air conditioner that excels at what it was intended to do and provides direct, near-instant cooling even in the harshest conditions.

The cherry on top?

Since there's a 30-day full-refund return policy - you really haven't got anything to lose if you buy Zero Breeze Mark 2.

Zero Breeze Mark 2

  • Ideal for personal cooling and cooling small spaces
  • Perfect for heavy-duty outdoor use
  • Notably quieter
  • Lowers the temperature better in humid conditions than evaporative coolers
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Ile Kauppila

SEO Writer

Ile Kauppila
Ile Kauppila is a globetrotting writer and editor living in Virginia. Ile holds an MA degree in Multimedia Journalism and a BA in English Philology. Ile has written for a variety of home, HVAC, and energy-related websites and publications. He has covered HVAC solutions, insulation, and energy-efficient construction, automotive AC systems for multiple auto dealerships and garages.

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