Pot Still Calculator

Pot still distillation is the oldest and most traditional distillation method — wash is loaded all at once into a single closed vessel (the pot still), heated, and the resulting vapor passes to a condenser, where it turns back into liquid. This is a batch (cyclical) process — each "charge" is a separate, independent cycle, unlike column stills, which operate continuously.

Its main distinguishing feature — a pot still typically provides only one (rarely two) theoretical equilibrium stage for the entire cycle (see Theory below). This means the distillate is never pure ethanol — it contains a significant amount of other volatile compounds (esters, fusel oils, congeners) carried over from the raw material (grapes, wheat, malt), and it's precisely these that give the spirit its characteristic aroma and flavor.

Advantages: (1) it maximally preserves the raw material's characteristic aromatic profile — this is exactly why pot stills are preferred for flavorful, characterful spirits, while column stills are preferred for neutral spirit; (2) it gives the distiller full control over each individual run's "cuts" (heads/hearts/tails); (3) equipment is relatively simple and inexpensive for small-scale production; (4) many protected designation-of-origin regulations (e.g., Cognac) directly require pot-still distillation as a guarantee of authenticity.

Where it's used: Cognac production (Hennessy, Rémy Martin, Martell) is legally required to use double distillation specifically in a copper Charentais pot still. Scotch single malt whisky (The Macallan, Glenfiddich, Glenlivet, Lagavulin) is also legally required to use pot still distillation. Irish "Pot Still Whiskey" is an entirely separate, protected category (Redbreast, Green Spot), carrying the method's name directly in its title. Many craft gin and mezcal producers also favor pot stills, for fullness of aroma.