Ooni Koda 12 is designed for outdoor use only. You must also leave 3 feet/1 meter of clearance on all sides of your oven and 9 feet/3 meters of clearance above your oven. This means Ooni Koda 12 will not be suitable for use on most balconies.
When your oven is not in use, use the Ooni Koda 12 Carry Cover to keep it safe from the elements. When weather is stronger than usual (such as heavy snow, rain, or extended exposure to sea breeze), store your oven indoors.