A:Answer Hello, thank you for your inquiry. The 9,000 BTU is that SACC BTU rating. The ASHRAE BTU rating is 14,000. You will find that when looking at a portable air conditioning unit, the SACC rating will be lower than the ASHRAE rating. However, the actual cooling capacity hasn’t changed – the difference is simply due to the different testing procedure. There haven’t been any internal changes to the units, and their functionality remains the same.