An evaporative AC, or swamp cooler, uses the natural principle of water evaporation to cool air, drawing warm air through water-soaked pads, which absorbs heat as the water evaporates and creates cooler, more humid air that is then circulated into a space. Unlike refrigerated air conditioners, they consume less energy, do not use harmful refrigerants, and are most effective in hot and dry climates, adding moisture to the air while they operate.

How an Evaporative AC Works

1. Warm Air Intake: A fan pulls warm outdoor air into the unit.

2. Water-Saturated Pads: The air passes through cooling pads that are saturated with water.

3. Evaporation: As the water evaporates from the pads, it absorbs heat from the air in a process similar to how a person feels cold after a bath.

4. Cool Air Output: This process removes heat from the air, and the now-cooler air is then blown into the room.

Key Characteristics

• Principle:Operates on the natural process of water evaporation to cool air.

• Energy Efficiency:Uses significantly less electricity than traditional refrigerated air conditioners.

• Environmental Impact:Considered eco-friendly because it does not use refrigerants or other artificial chemicals.

• Humidification:Adds moisture to the air, which is beneficial in dry climates, but can make the air feel damp in already humid conditions.

• Fresh Air:Continuously brings in fresh outside air rather than recirculating indoor air.

• Cost-Effectiveness:Has lower purchase, installation, and operating costs compared to refrigerated AC units.

• Ideal Conditions:Most effective in hot and dry climates where the air's low humidity allows for efficient water evaporation.