How Evaporative Coolers Work
The Basics
Evaporative coolers, sometimes called swamp coolers, use the natural process of water evaporation to provide refreshing airflow. Instead of using heavy compressors like air conditioners, they pass air over a moistened filter or pad. As the water evaporates, the air temperature drops, creating a cool breeze.
Why It’s Different from Air Conditioning
Unlike traditional air conditioning:
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Evaporative coolers don’t need refrigerants or high electrical power.
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They consume very little energy — perfect for 12V, battery, or solar setups.
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They add a little moisture to the air, which is comfortable in hot, dry climates.
👉 Best of all, this makes them lightweight, portable, and highly efficient for camping, RV travel, and off-grid use.
When They Work Best
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Dry, low-humidity environments give the strongest cooling effect.
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In humid areas, cooling is more modest, but the airflow still provides comfort.
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Always allow ventilation (open a tent flap, window, or vent) so warm air escapes and fresh air circulates.
Benefits for Camping & Travel
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Ultra-low power draw — runs from vehicle sockets, deep-cycle batteries, or solar.
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Compact & portable — easy to move between a tent, truck bunk, or RV.
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Water efficient — one tank lasts for hours of cooling.
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Safe for pets when used responsibly, with supervision and airflow.
Why Choose Transcool
The Transcool E3 is built specifically for tough travel conditions:
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Road-tough design proven in Australia and the USA.
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Reliable cooling without draining your power system.
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Flexible use across tents, caravans, RVs, 4WDs, and even pet setups.
- http://Energy.gov – How Evaporative Coolers Work