Occupancy-Based Ventilation revolutionizes Cabin AC – While Achieving Big Energy Savings

Air conditioning on cruises requires a great deal of energy – especially in the more exotic climates. With this in mind, Koja Marine developed a ventilation technology that revolutionizes the efficiency of cabin air conditioning. The name of the innovation: OBV^® (Occupancy-Based Ventilation).

OBV^® is a patented solution that optimizes cabin ventilation based on actual occupancy and cabin conditions. The solution supports energy-efficient ship operations by automatically adjusting ventilation according to real-time data, including occupancy, temperature, humidity and CO₂ levels. When cabins are unoccupied, ventilation can be reduced or shut off without compromising indoor air quality.

An article published in SEATEC 2/2026 highlights the development of the OBV^® solution and its implementation together with Carnival Maritime GmbH.

The collaboration has demonstrated:

• 44% energy savings in cabin air conditioning
• Proven scalability from 100 to 2,000 cabins
• No compromise on passenger comfort or compliance

Read the full article in SEATEC 2/2026 (page 26).

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