A trailer air conditioner is essential for anyone traveling in an RV, camper, or enclosed trailer. It ensures a comfortable temperature, protects sensitive equipment from heat damage, and enhances the overall experience. Whether you're camping in the desert or traveling through humid regions, the right AC unit can make all the difference.
Types of Trailer Air Conditioners
| Type | Description | Best For |
|---|---|---|
| Rooftop AC | Mounted on the roof, saves space inside the trailer | RVs, large campers |
| Portable AC | Freestanding unit that can be moved easily | Small trailers, budget-conscious users |
| Window AC | Installed in a window or wall opening | Compact trailers, energy-efficient cooling |
| Split-System AC | Indoor and outdoor units for better cooling efficiency | Large trailers, full-time travelers |
| Ducted AC | Distributes air through ducts for even cooling | Luxury RVs, larger trailers |
| Non-Ducted AC | Direct air output without ducts | Small to medium trailers |
How to Choose the Best Trailer Air Conditioner
1. Cooling Capacity (BTU Rating)
BTU (British Thermal Units) measures how much heat an AC can remove per hour. Here’s a quick guide:
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5,000-8,000 BTU → Small trailers (under 200 sq. ft.)
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8,000-13,500 BTU → Mid-sized trailers (200-400 sq. ft.)
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13,500-15,000+ BTU → Large trailers (400+ sq. ft.)
2. Power Consumption
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12V DC Models: Ideal for off-grid camping, runs on batteries or solar power.
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120V AC Models: Standard units requiring shore power or a generator.
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Hybrid Systems: Can switch between battery and shore power for flexibility.
3. Noise Levels
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Under 50 dB: Whisper-quiet, perfect for sleeping.
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50-60 dB: Moderate noise, common in rooftop and split systems.
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Above 60 dB: Louder, found in some budget models.
4. Installation & Space Considerations
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Rooftop ACs: Require at least 14" x 14" roof cutout.
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Window ACs: Need proper support brackets and ventilation.
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Portable ACs: Must have an exhaust vent, usually through a window or door.
5. Energy Efficiency
Look for models with:
✅ Energy Star certification
✅ Eco mode & sleep settings
✅ Inverter technology for variable cooling
Top Trailer Air Conditioners (2025 Edition)
| Model | BTU Rating | Power Source | Noise Level | Best For |
|---|---|---|---|---|
| Dometic Brisk II | 13,500 BTU | 120V AC | 55 dB | Mid to large trailers |
| Coleman Mach 15 | 15,000 BTU | 120V AC | 60 dB | Hot climates, large trailers |
| Zero Breeze Mark 2 | 2,300 BTU | 12V Battery | 45 dB | Small trailers, off-grid camping |
| Black+Decker BPACT08WT | 8,000 BTU | 120V AC | 50 dB | Small to mid-size trailers |
| Furrion Chill 14.5K | 14,500 BTU | 120V AC | 54 dB | Luxury RVs, ducted systems |
Installation Guide: How to Set Up a Trailer Air Conditioner
For Rooftop ACs
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Measure the Roof Opening: Standard size is 14” x 14”.
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Seal the Edges: Use weatherproof sealant to prevent leaks.
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Secure the Unit: Bolt the AC to the frame to prevent movement.
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Connect Power: Ensure correct voltage and wiring setup.
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Test & Adjust Settings: Run the AC and check airflow.
For Window ACs
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Select the Right Size: Ensure it fits snugly in the trailer window.
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Use Brackets for Support: Prevents damage from vibrations.
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Seal the Edges: Prevents air leaks and improves efficiency.
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Secure Power Source: Use a surge protector for safety.
For Portable ACs
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Choose a Vent Location: Typically through a window or a modified vent hole.
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Attach the Exhaust Hose: Prevents heat buildup inside the trailer.
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Use Drainage System: Some units require manual or automatic drainage.
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Optimize Airflow: Position in an open area for best results.
Maintenance Tips for Longer Lifespan
✅ Clean the Filters Monthly
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Improves efficiency
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Prevents dust buildup
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Extends unit lifespan
✅ Check for Refrigerant Leaks
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Low cooling power? Inspect for leaks in the system.
✅ Inspect Electrical Components
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Loose wires can cause malfunctions or fire hazards.
✅ Seal Gaps & Air Leaks
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Enhances efficiency and reduces power consumption.
✅ Use a Surge Protector
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Protects against power spikes from generators or shore power.
Common Problems & Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| AC Not Cooling | Clogged filter, low refrigerant | Clean filter, check refrigerant levels |
| Water Leaks Inside | Blocked drain pan, poor installation | Clear drain lines, reseal edges |
| Unit Won’t Turn On | Tripped breaker, faulty wiring | Reset breaker, inspect wiring |
| Loud Noise | Loose fan blade, compressor issue | Tighten components, call technician |
Frequently Asked Questions (FAQs)
1. Can I run a trailer air conditioner on solar power?
Yes, but you’ll need a large battery bank and a powerful inverter. A 2000W inverter and at least 400Ah of battery capacity are recommended for most units.
2. How long can a portable AC run in a trailer?
A standard 12V battery-powered AC can run for 4-6 hours on a full charge, while a generator-powered unit can run indefinitely as long as fuel is available.
3. What’s the best AC for extreme heat?
The Coleman Mach 15 and Dometic Brisk II perform well in high temperatures due to their high BTU ratings and robust compressors.
4. Do I need insulation for better cooling?
Yes! Adding reflective insulation (like Reflectix) to windows and walls significantly improves cooling efficiency.
5. Can I install an air conditioner in a cargo trailer?
Yes! Many travelers convert cargo trailers into campers by adding window or rooftop ACs.