If you're investing in an air conditioning unit for your campervan or motorhome, you're probably wondering:
“Which is quieter—Truma or Dometic?”
Noise level matters more than you might think. Whether you're parked up at a campsite, stealth camping on a city street, or just trying to sleep through a hot summer night, a loud AC unit can ruin the experience.
🔇 Why Air Con Noise Level Is So Important
Motorhome air conditioning noise comes from:
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The compressor and internal fan
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Airflow resistance (especially on low vents)
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Vibration against the roof or wall
A quieter unit doesn’t just improve sleep—it also lets you use your air con at night, without annoying neighbours, and off-grid without maxing your power draw.
🥇 Dometic: Quiet Operation + Range Variety
Popular model: Dometic FreshJet FJX4 2200
Noise level (indoor): ~43–47 dB(A)
Noise level (outdoor): ~52–59 dB(A)
Pros:
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Whisper-quiet on low fan setting
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Multi-zone control via Dometic app
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Auto night mode for reduced volume and energy use
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Available in both 2200 BTU and 3000 BTU models
Real-World Use:
Users say the FreshJet line is quiet enough for light sleepers, especially when paired with insulated roof installation. You’ll barely notice it running at night on Eco mode.
🥈 Truma: Precision Climate Control, Moderate Noise
Popular model: Truma Aventa Comfort
Noise level (indoor): ~46–55 dB(A)
Noise level (outdoor): ~60+ dB(A)
Pros:
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Built-in heating + cooling (heat pump)
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Excellent for year-round touring
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Energy-efficient with adjustable fan settings
Trade-off:
While powerful and great for mixed-season travel, Truma units are noticeably louder at full speed. Sound insulation and careful installation help, but if quiet running is your top priority, Dometic edges ahead.
🔌 Noise vs Power Draw: The Balance for Off-Grid Travellers
If you’re going off-grid, noise often correlates with energy use. Quieter units tend to offer:
Dometic models like the FJX4 are more optimised for 12V lithium setups, which means they stay cooler—and quieter—without flattening your leisure battery.
🛒 Our Verdict: Best for Quiet Comfort
| Feature |
Dometic FreshJet |
Truma Aventa |
| Noise level |
★★★★☆ |
★★★☆☆ |
| Energy efficiency |
★★★★☆ |
★★★☆☆ |
| Heating included |
✖ |
✔ |
| Off-grid friendly |
✔ |
Limited |
| Smart control |
✔ |
✔ |
🏆 Best for quiet, everyday comfort: Dometic
👍 Best for all-season versatility: Truma
🛍️ Browse Our Range
At UK Camping & Leisure, we stock a handpicked range of Dometic and Truma air conditioning systems with expert support and fast delivery across the UK.
👉 Shop motorhome air conditioning units
👉 Need help choosing? Contact our team
📌 Quick Tips to Reduce AC Noise Further
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Install with a vibration-dampening roof gasket
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Add insulation above and around the internal unit
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Regularly clean filters and fan blades
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Use a motorhome cover during winter to protect the unit from dust and UV wear
