The Honeywell HL series portable air conditioner with heater combines 4-in-1 technology into one luscious and sleek body, cooling, heating, and dehumidifying areas up to 700 square feet. With cooling and heating functions in one, this unit is available for year?round use, keeping you cool during hot summers and warm during cold winters. It features an auto-evaporation system, a reliable dehumidifying function as well as a traditional three-speed fan-only function delivering optimum cooling, dehumidification and fresh ventilation. The full-function remote control allows you to operate each feature from across the room. Unlike a fixed air conditioner unit, the Honeywell Portable Air Conditioner requires no permanent installation and the smooth-gliding caster wheels provide easy mobility from room to room. Plus, it comes with everything needed including a flexible exhaust hose and an easy-to-install window venting kit. *In October 2017, the Department of Energy implemented a new test procedure which take various factors into account and generate a lower BTU rating of portable air conditioners to indicate capacity. However, the actual capacity has not changed - the difference is simply due to the different test procedure. There have been no internal changes to these units, and the functionality remains the same. Please refer to room size guidelines to find the portable air conditioner that best meets your needs. Please also refer to AHAM website.