Air Choice Showdown Excerpt: We recently set up the Air Choice Portable Air Conditioner in our home office, eager to test its 4,500 BTU extension against the powerful 6,500 BTU core for cooling up to 450 sq. ft. While we appreciate its 24-hour timer for scheduling off periods, we’ve found the dehumidifier mode genuinely useful—especially in our basement. The remote control makes adjustments seamless, and the 3-in-1 functionality (AC, fan, and dehumidifier) has made it a versatile addition to our space. The window kit was simple to install, though we recommend verifying fitment beforehand. So far, the balance of cooling power versus energy efficiency has exceeded our expectations, making it a practical choice for its size.