Generator + window AC is too heavy to set up every night, noisy, and I have to store fuel. Painful!
Even at night in Texas, it's 90°F. No AC means zero sleep, and I risk dozing off the next day.
I don' t dare crack the window in strange places. Too risky. But a closed cab is so hot without AC.
My fleet warns me for excessive idling. I only have a couple hours allowance, which is never enough.
Set up in 5 minutes with quick installation kits, no heavy lifting or generator required.
Features 5,280 BTU of cooling capacity—enough to keep your bunk area around 70°F.
Costs a fraction of the price of a diesel APU ($8K–$10K).
Runs on a dedicated battery or directly from the truck’s power.
| Method | Cooling Performance | Cost | Convenience | Noise | Adaptability |
| Idling Engine AC | Strong, but fuel-heavy | $20–$30 in fuel per night | No setup needed | High (engine rumble) | Not suitable for long-term use |
| Generator and Window Unit | Very cool, but bulky | $700–$1000+ fuel/maintenance | Daily setup & carry | High (generator noise) | Limited by space and weight |
| Evaporative/Ice Cooler | Effective only if dry | $300 (plus constant ice/water) | Frequent ice refill | Moderate | Less effective in humid climates |
| Mark 3 Portable AC | Efficient bunk cooling | $1000+ (financing available) | Quick 5-min setup, no heavy lifting | Low (46 dB in Sleep mode) | Works in all weather conditions |
For Mark 3 Basic (AC Only), the package includes the following:
The Mark 3 measures 22" x 10" x 12" and weighs 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.
Yes, it is sufficient to cool the closed bunk or sleeping area of your truck. You don’t need to cool the entire cab as focusing on the sleeping space helps conserve energy and improves cooling efficiency.
For best results, we recommend using a curtain to partition off your sleeping area and directing the front air outlet duct toward that space for more targeted cooling.
The power consumption of the Mark 3 varies depending on the operating mode:
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 room temperature to your desired level, and then using the Mark 3’s heating mode to help maintain that temperature.
As with most air conditioners, during cooling operations, the front of the unit releases cold air while the rear expels warm air.
The noise level varies depending on the mode:
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:
As a result, the dual-duct system provides better cooling performance and enhanced energy efficiency compared to single-duct portable air conditioners.
Whether or not ducts are necessary depends on your environment and setup:
For targeted cooling, you can also install the front air outlet duct in either case to direct airflow more precisely to the desired area.
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:
The runtime depends on usage. A fully charged Mark 3 battery typically lasts 5-7 hours in Sleep mode. For a full 10-hour rest, we recommend using two batteries. When the first battery depletes, the second will automatically take over, providing continuous power throughout the night—so you won’t need to wake up to swap batteries.
You can recharge the Mark 3 battery through several methods:
No. The Mark 3 can also run on third-party power supplies.It requires up to 500W of power and can operate from:
Yes, we offer financing through Shop Pay and Klarna at checkout, allowing you to choose an installment payment plan.
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.