Air Conditioner, 12000 BTU, 7500 BTU, 24 Hour, Portable AC Unit with Built-in Cool, Dehumidifier&Fan Modes for Room up to 450 sq.ft, Timer

Measured under ideal lab conditions using the older standard. For real-world performance, please refer to the 7,500 BTU (SACC) rating. Wash the filter every two weeks to keep the efficiency. Key point: The unit itself is the same – only the testing method changed. Measured under real-world home conditions, following the current DOE requirement. SACC (Seasonally Adjusted Cooling Capacity) gives you a more realistic estimate of how the unit will perform in your actual living space. The ASHRAE number is higher because it does not account for real-life factors like heat leakage through windows, doors, or walls.