Tertiary enumeration of maturation variables, not demonstrated independent corroboration or quantified effects. Exclude the same-page climate-age equivalence and deterministic color/age inferences. Use technical oak and cask sources for mechanisms.
This list appears in the general whiskey-production chapter after an overview of wood-aging processes and before a comparison of northern European and southern United States maturation environments.
The guide identifies barrel type, oak origin and drying, toast or char, prior use, warehouse construction, windows, ventilation or heating, building height, stacking method, barrel position, geography, climate, humidity, and seasonal temperature swings as variables that influence maturation and the finished spirit.
Printed p. 121 / PDF sheet 121
Chapter 5 — Maturation
Visually verified against rendered PDF sheet 121, which displays printed p. 121. The comparative aging-rate estimate was not retained.
Verified paraphrase from the Society of Wine Educators' 2025 study guide.
Evidence
The guide enumerates barrel type and treatment, warehouse construction and ventilation, building height, stacking, barrel position, geography, climate, humidity, and temperature swings as maturation variables.
Location and context
Chapter 5, Maturation; printed p. 121 / PDF sheet 121. The list follows the overview of wood-aging processes and precedes a cross-climate comparison.
Annotation
This restates the barrel–warehouse–climate systems model as tertiary orientation; independence of its underlying evidence has not been established. The unsupported aging-rate ratio on the same page is deliberately excluded.