Commercial-grade portable air conditioners offer cooling capacities that range from 16,000 to 60,000 BTUs (British Thermal Units). They can be used to cool large rooms and spaces from 500 to 2,000 square feet or 4,000 to 16,000 cubic feet assuming your space has typical 8-foot ceilings. These portable air conditioners are ideal for cooling oversized rooms, large computer server rooms, manufacturing facilities, large offices, and special event spaces. Some commercial-grade models have specific installation, ventilation, or electrical requirements. We recommend the following portable ACs for cooling large spaces.