The AP14001HS EdgeStar Extreme Cool Dual Hose 14,000 BTU Portable Air Conditioner and Heater is one of the most powerful units on the market and is our top pick for larger spaces up to 525 square feet. Simply put, based on our independent testing and customer feedback, the EdgeStar AP14001HS Portable Air Conditioner offers the perfect combination of cooling power, quality, and style for larger spaces. We recommend this dual hose portable air conditioner as the best choice for cooling rooms from 400 - 525 square feet.. Here are the primary reasons the EdgeStar Extreme Cool units are not only in a class of their own, but are also the most popular units we offer: * Superior Engineering: Through quality construction and more durable internal components, the AP14000HS is designed to last longer and work in more rigorous environments than other brands. * Self-Evaporative System: This AP14001HS offers a new patented Z-Spray auto drain exhaust system that essentially eliminates the need to empty any water from the unit. It also offers a direct drain option that allows you to run the unit 365 days a year without having to empty any water accumulation. * Cool Boost Technology: Provides a cooling boost that allows the unit to operate more efficiently and lower your energy cost. * Dual Hose Design: Proven to provide more efficient and effective cooling (can be used as single hose as well). * Year Round Versatility: 4 In 1 air conditioner, heater, dehumidifier & fan that can be used year round