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. architectural elements
7. [structural elements and components for structural elements]
8. structural elements
9. enclosing structural elements
10. [walls and wall components]
11. walls
12. [walls by function]

Anotations

Scope note:

Garden walls provided with heating channels, or flues, which create an artificial microclimate for assisting in the growth or ripening of fruit tress or shrubs trained against the walls; popular in the 18th and 19th centuries.