Energy density in batteries refers to the amount of energy a battery can store relative to its size or weight. Think of it as how much "fuel" you can pack into a given container.

COBie (Construction Operations Building Information Exchange) is not a classification system itself, nor does it prescribe a fixed set of abbreviations for MEP piping and duct systems. Instead, COBie is a data exchange standard that focuses on delivering maintainable asset information from construction to operations.

In AEC (Architecture, Engineering, and Construction) and BIM (Building Information Modeling) environments, standardized abbreviations for piping and duct systems are crucial for clarity, consistency, and efficient data exchange.