What is defined as an appliance under the mechanical code?

An appliance, as defined under the mechanical code, refers specifically to a device that utilizes energy and is governed by certain code requirements. This encompasses a wide range of equipment, such as heating and cooling systems, water heaters, and other machines that require energy input to perform a function for comfort or safety in a building. These appliances are subject to regulations and standards to ensure they operate safely and efficiently, complying with the mechanical codes established to protect both the users and the structure.

The other choices do not align with the definition of an appliance in the mechanical context. Items used solely for storage do not function as devices that utilize energy; tools for mechanical work, while potentially powered, are not typically classified under appliances; and decorative fixtures, although part of a building’s aesthetic, do not fall under the same operational classification as energy-utilizing devices.