Mini / Personal (up to 0.5): Compact devices for the office, car, or bedside table. Require frequent refilling
Small (0.6–2.5): Provides 6 to 10 hours of runtime. Ideal size for bedrooms
Medium (2.6–5.0): Long runtime (12 to 24+ hours) without frequent refilling. Ideal for everyday use in the living room
Heavy Duty (5.0 and above): Maximum capacity for continuous operation for over 24–48 hours without refilling. Ideal for very large spaces, professional use, or all-day continuous use