Epicooler employs evaporative cooling: ambient air enters rear vents, passes over water-soaked cooling pads where evaporation absorbs heat, and exits chilled through front louvers. Oscillation distributes airflow evenly. In heating mode, PTC ceramics provide quick warmth. No refrigerants or exhaust hoses neededsimply fill the tank, power on, and adjust speeds. Optimal in low humidity (<50%), it adds moisture beneficial for dry climates while purifying air via filters