True or False: Ducts should be attached to a wall furnace?

Wall furnaces are designed to operate as standalone heating units and typically do not require ductwork. They are usually vented directly outside, and their primary purpose is to provide localized heating to a specific area. The design of a wall furnace specifies that it draws in room air, heats it, and then circulates it back into the room without the need for ductwork. This setup allows for efficient heating in smaller or individual spaces, minimizing heat loss that can occur in a ducted system.

While it may be necessary to use ducts in some heating systems, such as central heating systems or in larger multi-family buildings, attaching ducts directly to a wall furnace is generally not required and can even be detrimental to its operation. Therefore, stating that ducts should be attached to a wall furnace is false, as it contradicts the intended use and operational design of wall furnaces.