Unlike other air conditioners that have to be precisely sized, Breeze comes in two capacities: small and large. The small system works well for spaces that are 100-550 square feet and the large system is designed for spaces that are from 550 to 1500 square feet. Each system will automatically adjust to your needs. And, the entire system comes with everything you need in just one box: the indoor unit with the 25' quick-connect line, the outdoor unit, outdoor unit mounting pad, hardware, and LCD remote control. The box has even been specially designed to fit through narrow doorways. Best of all, the installation is a snap. Breeze. It's that easy.