Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]
6. system components
7. HVAC components
8. heat-distributing units

Anotations

Scope note:

Architectural components, generally in passive solar systems, designed to store heat energy, usually radiated back into spaces as ambient temperature drops; derived from and may also be used for the amount of potential heat storage capacity available in a given component or system.