An Inland Revenue condenser is a type of condenser used in the distillation process. Distillation is a process used to separate and purify liquids based on their boiling points. The Inland Revenue condenser is used to cool and condense the vapor produced during distillation, causing it to return to a liquid state.

The condenser is designed to be highly efficient, to minimize heat loss and maximize the amount of vapor that is condensed back into a liquid. The term “Inland Revenue” refers to the British government agency that was responsible for taxing the production and sale of alcohol.

As such, the Inland Revenue condenser was likely used in the production of distilled spirits for tax purposes.