There are wood-burning ovens that are suitable for both indoor and outdoor use, but many models are designed for one or the other. For example, a popular choice for indoor use is the built-in oven, which is installed into the wall of the house.
Some outdoor oven models are designed with roofs or other structures that do not fit indoors easily. Many manufacturers of wood-burning ovens use the same materials to create the actual oven surface, but the exterior models vary significantly. Modular ovens can usually be installed indoors or out because the decorating is left to the owner. There are also portable wood-burning ovens that are designed for outdoor use, similar to a barbecue grill.