"A powerful, inefficient, and dishonestly specified AC for a price that reflects its actual performance."
The 14,000 BTU ASHRAE rating measures raw cooling production, while the 10,000 BTU SACC rating reflects real-world performance after accounting for the heat the unit itself generates. You are buying a 10,000 BTU unit.
This is for renters who cannot install a window unit and need maximum cooling BTUs for the lowest initial price. A buyer who understands they're getting a loud, inefficient 10,000 SACC BTU machine for a fair price will be satisfied.
Anyone sensitive to noise, concerned with electricity costs, or able to install a more efficient window AC should skip this. The 63-pound weight and potential for drainage hassles also make it a poor choice for those needing true portability.