Many customers choose to install their spas outside to take advantage of the fresh air and backyard views. While installation is generally easier outdoors, choosing to locate your spa inside also has its advantages, such as enhanced privacy and protection from the weather. If you are interested in an indoor installation, you will need to ensure the room has proper ventilation and is large enough to accommodate the unit. Due to the sheer size of even a small hot tub, delivering the unit to your home could be problematic if you do not have large entryways. If you are building a new hot tub room, consider having the unit delivered before the last wall goes up.